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{{protection padlock|small=yes}}
{{Use dmy dates|date=August 2020}}
{{Use dmy dates|date=August 2020}}
{{Use Indian English|date=February 2021}}
{{Use Indian English|date=February 2021}}
<!--{{Italic title}} (Other tank names in WP are not italicised)--->
<!--{{Italic title}} (Other tank names in WP are not italicised)--->
{{Infobox weapon
{{Infobox weapon
| name = Arjun
| name               = Arjun
| image = Arjun MK1A field trials.jpg
| image             = Arjun MK1A field trials.jpg
| image_size = 300
| image_size         = 300
| caption = New Arjun MK1A variant during field trials.
| caption           = New Arjun MK1A variant during field trials.
| type = [[Main battle tank]]
| type               = [[Main battle tank]]
| is_vehicle = yes
| is_vehicle         = yes
| origin = [[India]]
| origin             = [[India]]
<!-- Service history -->
<!-- Service history -->
<!-- Production history -->
<!-- Production history -->
| designer =  
| designer           = [[Combat Vehicles Research and Development Establishment]] <!-- Infobox weapon now allows design groups in the designer section -->
* [[Combat Vehicles Research and Development Establishment]]
| design_date       = 1983–1996
* [[Defence Research and Development Organisation]]<!-- Infobox weapon now allows design groups in the designer section -->
| manufacturer       = [[Armoured Vehicles Nigam Limited]] (at [[Heavy Vehicles Factory]])
| design_date = 1983–1996
| developed_into    = [[Future Main Battle Tank]]
| manufacturer = [[Armoured Vehicles Nigam Limited]] (at [[Heavy Vehicles Factory]])
| unit_cost         =  
| unit_cost =  
| production_date   = 2004–''present''
| production_date = 2004–present
| number             = 141 (as of 2021){{refn|15 pre-production prototypes (PPS-1 to PPS-15), 124 Arjun MK1, 2 MK1A prototypes.<ref name=":2">{{Cite web|last=Mann|first=Maj Gen Rambir|date=2021-04-14|title=Why MBT Arjun Tank should be embraced by the army?|url=https://finsindia.org/a-tankful-of-promise-why-mbt-arjun-should-be-embraced-whole-heartedly-by-the-army/|access-date=2021-06-22|website=Forum For Integrated National Security (FINS) India|language=en-GB}}</ref><ref name=":13">{{Cite book|url=https://www.mod.gov.in/sites/default/files/MoDAR2018.pdf|title=Annual Report 2018-19|publisher=MoD|page=103|quote=MBT Arjun Mk-II has been designed and developed incorporating 84 improvements (73 tank fittable) over and above MBT Arjun Mk-I. During the year, two MBT Arjun Mk-1A prototypes were positioned at PFFR}}</ref>||group=N}}
| number = 141 (as of 2021){{refn|15 pre-production prototypes (PPS-1 to PPS-15), 124 Arjun MK1, 2 MK1A prototypes.<ref name=":2">{{Cite web|last=Mann|first=Maj Gen Rambir|date=2021-04-14|title=Why MBT Arjun Tank should be embraced by the army?|url=https://finsindia.org/a-tankful-of-promise-why-mbt-arjun-should-be-embraced-whole-heartedly-by-the-army/|access-date=2021-06-22|website=Forum For Integrated National Security (FINS) India|language=en-GB}}</ref><ref name=":13">{{Cite book|url=https://www.mod.gov.in/sites/default/files/MoDAR2018.pdf|title=Annual Report 2018-19|publisher=MoD|page=103|quote=MBT Arjun Mk-II has been designed and developed incorporating 84 improvements (73 tank fittable) over and above MBT Arjun Mk-I. During the year, two MBT Arjun Mk-1A prototypes were positioned at PFFR}}</ref>||group=N}}
| variants           = See ''[[#Variants|Variants]]''
| variants = See ''[[#Variants|Variants]]''
<!-- General specifications -->| crew               = 4 (commander, gunner, loader and driver)
<!-- General specifications -->| crew = 4 (commander, gunner, loader and driver)
| length             = '''MK1''': {{convert|10.19|m|ftin}}<br/>'''MK1A''': {{convert|10.64|m|ftin}}
| length = Mk.1: {{convert|10.19|m|ftin}}<br/>Mk.1A/Mk.2: {{convert|10.64|m|ftin}}
| width             = '''MK1''': {{convert|3.85|m|ftin}}<br/>'''MK1A''': {{convert|3.95|m|ftin}}
| width = Mk.1: {{convert|3.85|m|ftin}}<br/>Mk.1A/Mk.2: {{convert|3.95|m|ftin}}
| height             = '''MK1''': {{convert|2.32|m|ftin}}<br/>'''MK1A''': ~{{convert|2.8|m|ftin}}
| height = Mk.1: {{convert|2.32|m|ftin}}<br/>Mk.1A/Mk.2: ~{{convert|2.8|m|ftin}}
| weight             = '''MK1''': {{convert|58.5|t|abbr=off}}<br/>'''MK1A''': {{convert|68|t|abbr=off}}<ref>{{cite web |url=https://theprint.in/defence/army-set-to-place-order-for-118-arjun-mark-1-as-the-most-potent-tank-in-its-inventory/380869/ |title=Army set to place order for 118 Arjun Mark 1-As, the most potent tank in its inventory |date=16 March 2020 |last=Philip |first=Snehesh Alex |access-date=3 June 2021}}</ref><!-- please provide reference for changes in weight, if a more accurate or reliable source is found-->
| weight = Mk.1: {{convert|58.5|t|abbr=off}}<br/>Mk.1A: {{convert|68|t|abbr=off}}<ref>{{cite web |url=https://theprint.in/defence/army-set-to-place-order-for-118-arjun-mark-1-as-the-most-potent-tank-in-its-inventory/380869/ |title=Army set to place order for 118 Arjun Mark 1-As, the most potent tank in its inventory |date=16 March 2020 |last=Philip |first=Snehesh Alex |access-date=3 June 2021}}</ref><!-- please provide reference for changes in weight, if a more accurate or reliable source is found-->
| clearance         = {{convert|0.45|m|ftin}}
| clearance = {{convert|0.45|m|ftin}}
| armour             = [[Explosive reactive armour|ERA–NERA]], [[Kanchan armour]]
| armour = [[Explosive reactive armour|ERA–NERA]], [[Kanchan armour]] (classified)
| primary_armament   = 1× 120 mm rifled tank gun able to fire [[LAHAT]], [[SAMHO (missile)|SAMHO]],<ref>{{cite news |title=DRDO successfully test fires laser-guided anti-tank missile |url=https://timesofindia.indiatimes.com/india/drdo-successfully-test-fires-laser-guided-anti-tank-guided-missile/articleshow/78429444.cms |access-date=1 October 2020 |agency=PTI |work=The Times of India |date=1 October 2020}}</ref> [[High-explosive anti-tank|HEAT]], [[Armour-piercing fin-stabilized discarding sabot|APFSDS]], [[High-explosive squash head|HESH]], PCB, [[Thermobaric weapon|Thermobaric]] rounds<ref>{{cite web |title=120 mm Penetration Cum Blast (PCB) and Thermobaric (TB) Ammunition For MBT Arjun |url=https://www.drdo.gov.in/120-mm-penetration-cum-blast-pcb-and-thermobaric-tb-ammunition-mbt-arjun |website=DRDO |publisher=Ministry of Defence |access-date=26 July 2021}}</ref><br/>(Rate of fire: 6–8 rounds/minute, total: 42 containerized rounds)<ref>{{Cite web|title=Arjun Main Battle Tank specifications|url=https://ofb.gov.in/product/products/product-details/arjun---main-battle-tank|access-date=5 August 2021|website=OFB}}</ref><ref>{{cite news |author=Economic Times |title=Fire-power of DRDO's Arjun Tank takes quantum jump with new ammunition: MoD |url=https://economictimes.indiatimes.com/news/defence/fire-power-of-drdos-arjun-tank-takes-quantum-jump-with-new-ammunition-mod/articleshow/50514955.cms |access-date=8 December 2019 |agency=Press Trust of India |work=The Economic Times|date=14 July 2018}}</ref>
| primary_armament = 1× 120 mm rifled tank gun able to fire [[LAHAT]], [[SAMHO (missile)|SAMHO]],<ref>{{cite news |title=DRDO successfully test fires laser-guided anti-tank missile |url=https://timesofindia.indiatimes.com/india/drdo-successfully-test-fires-laser-guided-anti-tank-guided-missile/articleshow/78429444.cms |access-date=1 October 2020 |agency=PTI |work=The Times of India |date=1 October 2020}}</ref> [[High-explosive anti-tank|HEAT]], [[Armour-piercing fin-stabilized discarding sabot|APFSDS]], [[High-explosive squash head|HESH]], PCB, & [[Thermobaric weapon|TB]] rounds<ref>{{cite web |title=120 mm Penetration Cum Blast (PCB) and Thermobaric (TB) Ammunition For MBT Arjun |url=https://www.drdo.gov.in/120-mm-penetration-cum-blast-pcb-and-thermobaric-tb-ammunition-mbt-arjun |website=DRDO |publisher=Ministry of Defence |access-date=26 July 2021}}</ref><br/>(Rate of fire: 6–8 rounds/minute, total: 42 containerized rounds)<ref>{{Cite web|title=Arjun Main Battle Tank specifications|url=https://ofb.gov.in/product/products/product-details/arjun---main-battle-tank|url-status=live|access-date=5 August 2021|website=OFB}}</ref><ref>{{cite news |author=Economic Times |title=Fire-power of DRDO's Arjun Tank takes quantum jump with new ammunition: MoD |url=https://economictimes.indiatimes.com/news/defence/fire-power-of-drdos-arjun-tank-takes-quantum-jump-with-new-ammunition-mod/articleshow/50514955.cms |access-date=8 December 2019 |agency=Press Trust of India |work=The Economic Times|date=14 July 2018}}</ref>
| secondary_armament = 1 × [[NSV machine gun|NSV]] [[12.7×108mm|12.7mm]] AA [[machine gun|MG]] on [[Bharat Electronics|BEL]] [[RCWS]]<br/>1 × MAG 7.62 mm Tk715 coaxial MG<br/>12 × 81mm AT-AL smoke grenades. ('''MK1''') 16 × 81mm AT-AL smoke grenades. ('''MK1A''')<ref>{{cite web |title=Battlefield Protection System |url=https://www.drdo.gov.in/drdo/sites/default/files/technology-focus-documrnt/TF_Aug_2016_WEB.pdf |website=Defence Research and Development Organisation |publisher=Defence Scientific Information & Documentation Centre |access-date=10 July 2024}}</ref>
| secondary_armament = [[NSV machine gun|NSV]] [[12.7×108mm|12.7mm]] AA [[machine gun|MG]]<br/>MAG 7.62 mm Tk715 coaxial MG<br/>12 × smoke grenades
| engine            = '''MK1''': [[MTU Friedrichshafen|MTU]] MB 838 Ka-501 [[V10 engine|V10]]; 1,400 [[Horsepower|hp]] (1,030 kW) liquid-cooled turbocharged [[diesel engine]]<ref>{{cite web |title=Land Defense brochure |url=https://www.mtu-solutions.com/content/dam/mtu/download/applications/defense/16120014_LandDefense_brochure.pdf/_jcr_content/renditions/original./16120014_LandDefense_brochure.pdf |website=MTU |publisher=Rolls-Royce Group |access-date=9 July 2024}}</ref><br/> '''MK1A''': [[BEML#DATRAN 1500|DATRAN]]; 1,500 [[Horsepower|hp]] (1,118 kW) [[V12 engine]]<ref>{{Cite news |last=Pubby |first=Manu |date=2024-02-14 |title=India to develop engine for new Arjun tanks |url=https://economictimes.indiatimes.com/news/defence/india-likely-to-use-indigenous-engines-in-arjun-tanks-as-german-engines-getting-delayed-by-four-years/articleshow/107667794.cms?from=mdr |access-date=2024-02-14 |work=The Economic Times |issn=0013-0389}}</ref><ref>{{cite news |title=Indigenously developed 1500 HP prototype engine for future main battle tanks test fired |url=https://www.thehindu.com/news/national/karnataka/indigenously-developed-1500-hp-prototype-engine-for-future-main-battle-tanks-test-fired/article67971759.ece |access-date=20 March 2024 |work=The Hindu |date=20 March 2024}}</ref>
| engine = [[MTU Friedrichshafen|MTU]] MB 838 Ka-501 [[V10 engine|V10]]; 1,400 [[Horsepower|hp]] (1,044 kW) liquid-cooled turbocharged [[diesel engine]].
| fuel_capacity      = {{convert|1610|L}}
| fuel_capacity = {{convert|1610|L}}
| transmission      = [[Renk]] [[Epicyclic gearbox|epicyclic train gearbox]], 4 forward + 2 reverse gears.<br/>[[CVRDE]] [[automatic transmission]] in development
| transmission = [[Renk]] [[Epicyclic gearbox|epicyclic train gearbox]], 4 forward + 2 reverse gears.<br/>[[CVRDE]] [[automatic transmission]] in development
| suspension        = [[Hydropneumatic suspension|Hydropneumatic]]
| suspension = [[Hydropneumatic suspension|Hydropneumatic]]
| speed              = '''MK1''': ~{{convert|70|km/h|mph|abbr=on}}<br/>{{convert|40|km/h|mph|abbr=on}} cross country<ref name=":3">{{citation |url=http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |title=Technology focus |journal=Technology Focus: Bulletin of Defence Research & Development Organisation |volume=19 |number=3 |date=June 2011 |publisher=DRDO |access-date=10 June 2011 |issn=0971-4413 |archive-url=https://web.archive.org/web/20110809042539/http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |archive-date=9 August 2011 |url-status=dead}}</ref>
| speed = MK1: ~{{convert|70|km/h|mph|abbr=on}}<br/>{{convert|40|km/h|mph|abbr=on}} cross country<ref name=":3">{{citation |url=http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |title=Technology focus |journal=Technology Focus: Bulletin of Defence Research & Development Organisation |volume=19 |number=3 |date=June 2011 |publisher=DRDO |access-date=10 June 2011 |issn=0971-4413 |archive-url=https://web.archive.org/web/20110809042539/http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |archive-date=9 August 2011 |url-status=dead}}</ref>
| pw_ratio          = '''MK1''': 24 hp/ton<ref>{{cite web |url=https://www.drdo.gov.in/mbt-arjun-tank |title=MBT Arjun Tank |publisher=DRDO |access-date=2021-07-18}}</ref>
| pw_ratio = MK1: 24 hp/ton<ref>{{cite web |url=https://www.drdo.gov.in/mbt-arjun-tank |title=MBT Arjun Tank |publisher=DRDO |access-date=2021-07-18}}</ref>
| vehicle_range      = '''MK1''': {{convert|450|km|mi}}<ref name="ambt">{{Cite web |last1=Genys |first1=Andrius |title=Arjun - Main battle tank |url=http://www.military-today.com/tanks/arjun.htm |archive-url=https://web.archive.org/web/20070912035745if_/http://www.military-today.com/tanks/arjun.htm |url-status=usurped |archive-date=12 September 2007 |access-date=10 December 2019}}</ref>
| vehicle_range = MK1: {{convert|450|km|mi}}<ref>{{cite web |last1=Genys |first1=Andrius |title=Arjun |url=http://www.military-today.com/tanks/arjun.htm |website=Military-Today  |access-date=10 December 2019}}</ref>
| is_UK             = yes
| is_UK = yes
}}
}}


The '''Arjun''' ({{IPA-sa|ɐɽˈdʑʊn|pron}}) is a [[List of main battle tanks by generation#Third generation|third generation]] [[main battle tank]] developed by the [[Combat Vehicles Research and Development Establishment]] (CVRDE) of the [[Defence Research and Development Organisation]] (DRDO), for the [[Indian Army]].<ref>{{cite news|last=[[Press Trust of India]]|date=6 March 2013|title=A Look at Indian Army's Main Battle Tanks|publisher=India TV|url=http://www.indiatvnews.com/news/india/a-look-at-indian-army-s-main-battle-tanks-20569.html?page=2|url-status=live|access-date=4 August 2013|archive-url=https://web.archive.org/web/20131103045117/http://www.indiatvnews.com/news/india/a-look-at-indian-army-s-main-battle-tanks-20569.html?page=2|archive-date=3 November 2013}}</ref><ref>{{Cite news|last=Press Trust of India|date=2015-06-30|title=Chinese military research academy praises India's Arjun tank|work=[[Business Standard]] India|agency=Press Trust of India|url=https://www.business-standard.com/article/current-affairs/chinese-military-research-academy-praises-india-s-arjun-tank-115062900763_1.html|access-date=2021-06-20}}</ref> The tank is named after [[Arjuna]], the archer prince who is the main protagonist of the [[Indian epic poetry|Indian epic]] poem ''[[Mahabharata]]''. Design work began in 1986 and was finished in 1996. The Arjun main battle tank entered service with the Indian Army in 2004.<ref name="43AR">{{cite web |url=http://www.stratpost.com/army-gets-first-arjun-regiment |title=Army gets first Arjun regiment |author=Joshi, Saurabh |date=25 May 2009 |work=StratPost – South Asian Defense and Strategic Affairs |access-date=2 December 2011 |archive-url=https://web.archive.org/web/20120529183402/http://www.stratpost.com/army-gets-first-arjun-regiment |archive-date=29 May 2012 |url-status=live}}</ref> The [[43rd Armoured Regiment (India)|43rd Armoured Regiment]], formed in 2009, was the first regiment to receive the Arjun.<ref name="43AR"/><ref name="75AR">{{cite news|last=Press Trust of India|date=12 March 2011|title=Arjun Tank inducted into 75 armoured regiment|work=[[The Times of India]]|url=http://articles.timesofindia.indiatimes.com/2011-03-12/india/28683734_1_arjun-tank-armoured-regiment-southern-command|url-status=dead|access-date=29 June 2013|archive-url=https://web.archive.org/web/20131103202549/http://articles.timesofindia.indiatimes.com/2011-03-12/india/28683734_1_arjun-tank-armoured-regiment-southern-command|archive-date=3 November 2013}}</ref>
The '''Arjun''' ({{IPA|sa|ɐɽˈdʑʊn|pron}}) is a [[List of main battle tanks by generation#Third|third generation]] [[main battle tank]] developed by the [[Combat Vehicles Research and Development Establishment]] (CVRDE) of the [[Defence Research and Development Organisation]] (DRDO), for the [[Indian Army]].<ref>{{cite news|last=[[Press Trust of India]]|date=6 March 2013|title=A Look at Indian Army's Main Battle Tanks|publisher=India TV|url=http://www.indiatvnews.com/news/india/a-look-at-indian-army-s-main-battle-tanks-20569.html?page=2|url-status=live|access-date=4 August 2013|archive-url=https://web.archive.org/web/20131103045117/http://www.indiatvnews.com/news/india/a-look-at-indian-army-s-main-battle-tanks-20569.html?page=2|archive-date=3 November 2013}}</ref><ref>{{Cite news|last=Press Trust of India|date=2015-06-30|title=Chinese military research academy praises India's Arjun tank|work=[[Business Standard]] India|agency=Press Trust of India|url=https://www.business-standard.com/article/current-affairs/chinese-military-research-academy-praises-india-s-arjun-tank-115062900763_1.html|access-date=2021-06-20}}</ref> The tank is named after [[Arjuna]], the archer prince who is the main protagonist of the [[Indian epic poetry|Indian epic]] poem ''[[Mahabharata]]''. Design work began in 1986 and was finished in 1996. The Arjun main battle tank entered service with the Indian Army in 2004.<ref name="43AR">{{cite web |url=http://www.stratpost.com/army-gets-first-arjun-regiment |title=Army gets first Arjun regiment |author=Joshi, Saurabh |date=25 May 2009 |work=StratPost – South Asian Defense and Strategic Affairs |access-date=2 December 2011 |archive-url=https://web.archive.org/web/20120529183402/http://www.stratpost.com/army-gets-first-arjun-regiment |archive-date=29 May 2012 |url-status=live}}</ref> The [[43rd Armoured Regiment (India)|43rd Armoured Regiment]], formed in 2009, was the first regiment to receive the Arjun.<ref name="43AR"/><ref name="75AR">{{cite news|last=Press Trust of India|date=12 March 2011|title=Arjun Tank inducted into 75 armoured regiment|work=[[The Times of India]]|url=https://timesofindia.indiatimes.com/india/Arjun-Tank-inducted-into-75-armoured-regiment/articleshow/7686973.cms|url-status=live|access-date=29 June 2013|archive-url=https://web.archive.org/web/20131103202549/http://articles.timesofindia.indiatimes.com/2011-03-12/india/28683734_1_arjun-tank-armoured-regiment-southern-command|archive-date=3 November 2013}}</ref>


The Arjun features a 120&nbsp;mm rifled main gun with indigenously developed [[armour-piercing fin-stabilized discarding-sabot]] ammunition, one [[PK machine gun|PKT]] 7.62&nbsp;mm coaxial machine gun and a [[NSV machine gun|NSVT]] 12.7&nbsp;mm machine gun. Powered by a single [[MTU Friedrichshafen|MTU]] multi-fuel diesel engine rated at 1,400&nbsp;hp, it can achieve a maximum speed of {{convert|70|km/h|abbr=on|mi/h}} and a cross-country speed of {{convert|40|km/h|abbr=on}}.<ref name=":12"/> It has a four-man crew: commander, gunner, loader and driver.
The Arjun features a 120&nbsp;mm rifled main gun with indigenously developed [[armour-piercing fin-stabilized discarding-sabot]] ammunition, one [[PK machine gun|PKT]] 7.62&nbsp;mm coaxial machine gun and a [[NSV machine gun|NSVT]] 12.7&nbsp;mm machine gun. Powered by a single [[MTU Friedrichshafen|MTU]] multi-fuel diesel engine rated at 1,400&nbsp;hp, it can achieve a maximum speed of {{convert|70|km/h|abbr=on|mi/h}} and a cross-country speed of {{convert|40|km/h|abbr=on}}.<ref name=":12"/> It has a four-man crew: commander, gunner, loader and driver.
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In 2010 and 2013, the Indian Army carried out comparative trials in the [[Thar Desert]] of Rajasthan, pitting the newly inducted Arjun MK1 against the Indian Army's frontline Russian-designed [[T-90]] tanks, during which the Arjun reportedly exhibited better accuracy and mobility.<ref>{{cite news|last=Vikas|first=|date=29 January 2018|title=MBT Arjun is a formidable tank, but can it replace Russian made T-90?|publisher=One India|url=https://www.oneindia.com/india/mbt-arjun-is-formidable-tank-but-can-it-replace-russian-made-t-90-2629467.html|access-date=2 October 2020}}</ref><ref name=":17">{{Cite news|last=Shukla|first=Ajai|date=2010-03-25|title=Arjun tank outruns, outguns Russian T-90|work=Business Standard India|url=https://www.business-standard.com/article/economy-policy/arjun-tank-outruns-outguns-russian-t-90-110032500022_1.html|access-date=2021-06-20}}</ref>
In 2010 and 2013, the Indian Army carried out comparative trials in the [[Thar Desert]] of Rajasthan, pitting the newly inducted Arjun MK1 against the Indian Army's frontline Russian-designed [[T-90]] tanks, during which the Arjun reportedly exhibited better accuracy and mobility.<ref>{{cite news|last=Vikas|first=|date=29 January 2018|title=MBT Arjun is a formidable tank, but can it replace Russian made T-90?|publisher=One India|url=https://www.oneindia.com/india/mbt-arjun-is-formidable-tank-but-can-it-replace-russian-made-t-90-2629467.html|access-date=2 October 2020}}</ref><ref name=":17">{{Cite news|last=Shukla|first=Ajai|date=2010-03-25|title=Arjun tank outruns, outguns Russian T-90|work=Business Standard India|url=https://www.business-standard.com/article/economy-policy/arjun-tank-outruns-outguns-russian-t-90-110032500022_1.html|access-date=2021-06-20}}</ref>


The [[fire-control system]] (FCS) originally developed for the Arjun main battle tank has been integrated into the T-90 tanks built in India under a [[Technology transfer|transfer of technology]] (ToT) agreement by the [[Heavy Vehicles Factory]] (HVF) at Avadi.<ref name=":4">{{Cite web|author=Jha|first=Saurav|date=8 February 2015|title=A look at the Indian Army's Main Battle Tank programs|url=https://www.news18.com/blogs/india/saurav-jha/a-look-at-the-indian-armys-main-battle-tank-programs-10879-748711.html|url-status=live|archive-url=https://web.archive.org/web/20210816082248/https://www.news18.com/blogs/india/saurav-jha/a-look-at-the-indian-armys-main-battle-tank-programs-10879-748711.html|archive-date=16 August 2021|access-date=20 June 2021|website=[[News18 India|News18]]}}</ref>
The [[fire-control system]] (FCS) originally developed for the Arjun main battle tank has been integrated into the T-90 tanks built in India under a [[Technology transfer|transfer of technology]] (ToT) agreement by the [[Heavy Vehicles Factory]] (HVF) at [[Avadi]].<ref name=":4">{{Cite web|author=Jha|first=Saurav|date=8 February 2015|title=A look at the Indian Army's Main Battle Tank programs|url=https://www.news18.com/blogs/india/saurav-jha/a-look-at-the-indian-armys-main-battle-tank-programs-10879-748711.html|url-status=live|archive-url=https://web.archive.org/web/20210816082248/https://www.news18.com/blogs/india/saurav-jha/a-look-at-the-indian-armys-main-battle-tank-programs-10879-748711.html|archive-date=16 August 2021|access-date=20 June 2021|website=[[News18 India|News18]]}}</ref>


== History ==
== History ==
After the 1971 [[Bangladesh Liberation War]], the Government of India decided to develop a new main battle tank.<ref name=":27">{{Cite journal|last=Chattopadhyay|first=Sankalan|date=7 April 2021|title='A' is for Aatmanirbhar|url=https://www.vayuaerospace.in/article/634/-a-is-for-aatmanirbhar|journal=Vayu Aerospace and Defence Review|oclc=62787146|archive-url=https://web.archive.org/web/20211014150537/https://www.vayuaerospace.in/article/634/-a-is-for-aatmanirbhar|archive-date=14 October 2021|access-date=14 October 2021}}</ref> The Indian Army issued a general staff qualitative requirement (GSQR) for a new battle tank, called for a 50 tonne main battle tank equipped with a 120&nbsp;mm rifled gun, computerised FCS and powered by a 1,400&nbsp;hp diesel engine.<ref name=":1">{{cite journal|last=Geibel|first=Adam|url=https://www.benning.army.mil/armor/eARMOR/content/issues/1998/MAY_JUN/ArmorMayJune1998web.pdf|title=Arjun,India's Mythical Warrior, Is Nearing Reality|journal=Armor|publisher=The U.S. Army Armor Center|date=May–June 1998|volume= eVIl No.3|location=Kentucky|pages=33–34|issn=0004-2420}}</ref><ref name="globsec-arjun">[http://www.globalsecurity.org/military/world/india/arjun.htm Arjun] {{Webarchive|url=https://web.archive.org/web/20081022161931/http://www.globalsecurity.org/military/world/india/arjun.htm |date=22 October 2008}} globalsecurity.com</ref> The programme to develop an indigenous tank was authorised in 1974 and funds were released for its development. In 1976, the [[Combat Vehicles Research and Development Establishment ]] (CVRDE) was established under the [[Defence Research and Development Organisation]] (DRDO) to undertake the development of the Arjun main battle tank and to carry out research and development (R&D) on future combat vehicles for the Indian Army.<ref>{{Cite web|date=10 February 2012|title=DRDO|url=http://drdo.gov.in/drdo/labs/CVRDE/English/index.jsp?pg=HistoricalBG.jsp|access-date=22 June 2021|archive-url=https://web.archive.org/web/20120210025121/http://drdo.gov.in/drdo/labs/CVRDE/English/index.jsp?pg=HistoricalBG.jsp|archive-date=10 February 2012}}</ref>
After the 1971 [[Bangladesh Liberation War]], the Government of India decided to develop a new main battle tank.<ref name=":27">{{Cite journal|last=Chattopadhyay|first=Sankalan|date=7 April 2021|title='A' is for Aatmanirbhar|url=https://www.vayuaerospace.in/article/634/-a-is-for-aatmanirbhar|journal=Vayu Aerospace and Defence Review|oclc=62787146|archive-url=https://web.archive.org/web/20211014150537/https://www.vayuaerospace.in/article/634/-a-is-for-aatmanirbhar|archive-date=14 October 2021|access-date=14 October 2021}}</ref> The Indian Army issued a general staff qualitative requirement (GSQR) for a new battle tank, called for a 50 tonne main battle tank equipped with a 120&nbsp;mm rifled gun, computerised FCS and powered by a 1,400&nbsp;hp diesel engine.<ref name=":1">{{cite journal|last=Geibel|first=Adam|url=https://www.benning.army.mil/armor/eARMOR/content/issues/1998/MAY_JUN/ArmorMayJune1998web.pdf|title=Arjun, India's Mythical Warrior, Is Nearing Reality|journal=Armor|publisher=The U.S. Army Armor Center|date=May–June 1998|volume= eVIl No.3|location=Kentucky|pages=33–34|issn=0004-2420}}</ref><ref name="globsec-arjun">[http://www.globalsecurity.org/military/world/india/arjun.htm Arjun] {{Webarchive|url=https://web.archive.org/web/20081022161931/http://www.globalsecurity.org/military/world/india/arjun.htm |date=22 October 2008}} globalsecurity.com</ref> The programme to develop an indigenous tank was authorised in 1974 and funds were released for its development. In 1976, the [[Combat Vehicles Research and Development Establishment ]] (CVRDE) was established under the [[Defence Research and Development Organisation]] (DRDO) to undertake the development of the Arjun main battle tank and to carry out research and development (R&D) on future combat vehicles for the Indian Army.<ref>{{Cite web|date=10 February 2012|title=DRDO|url=http://drdo.gov.in/drdo/labs/CVRDE/English/index.jsp?pg=HistoricalBG.jsp|access-date=22 June 2021|archive-url=https://web.archive.org/web/20120210025121/http://drdo.gov.in/drdo/labs/CVRDE/English/index.jsp?pg=HistoricalBG.jsp|archive-date=10 February 2012}}</ref>


In 1983, the project began following a consultancy agreement with [[Krauss-Maffei Wegmann|Krauss-Maffei]], who had previously developed the [[Leopard 2]], to oversee design, development and evaluation, while Indian state owned [[Bharat Electronics]] Limited (BEL) and HVF were joined with the CVRDE in the development of the Arjun.<ref name=":2">{{Cite web|last=Mann|first=Maj Gen Rambir|date=2021-04-14|title=Why MBT Arjun Tank should be embraced by the army?|url=https://finsindia.org/a-tankful-of-promise-why-mbt-arjun-should-be-embraced-whole-heartedly-by-the-army/|access-date=2021-06-22|website=Forum For Integrated National Security (FINS) India|language=en-GB}}</ref> The original plan envisaged the development and rollout of the first tank prototype by 1980, which was later revised to 1987. The first prototype was delivered in 1989. The prototype tank resembled the Leo2A4 main battle tank of Germany.<ref name=":1"/>
In 1983, the project began following a consultancy agreement with [[Krauss-Maffei Wegmann|Krauss-Maffei]], who had previously developed the [[Leopard 2]], to oversee design, development and evaluation, while Indian state owned [[Bharat Electronics]] Limited (BEL) and HVF were joined with the CVRDE in the development of the Arjun.<ref name=":2">{{Cite web|last=Mann|first=Maj Gen Rambir|date=2021-04-14|title=Why MBT Arjun Tank should be embraced by the army?|url=https://finsindia.org/a-tankful-of-promise-why-mbt-arjun-should-be-embraced-whole-heartedly-by-the-army/|access-date=2021-06-22|website=Forum For Integrated National Security (FINS) India|language=en-GB}}</ref> The original plan envisaged the development and rollout of the first tank prototype by 1980, which was later revised to 1987. The first prototype was delivered in 1989. The prototype tank resembled the Leo2A4 main battle tank of Germany.<ref name=":1"/>
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=== Production and deployment ===
=== Production and deployment ===
[[File:Arjun MK1 tank.jpg|thumb|An early Arjun production model]]
[[File:Arjun MK1 tank.jpg|thumb|An early Arjun production model]]
One Arjun tank (PPS-15) operated by the [[43rd Armoured Regiment (India)|43rd Armoured Regiment]] made a public appearance in the 1997 and 2001 [[Delhi Republic Day parade|Republic Day Parade]]s.<ref name=":1"/><ref name="RDPArade2001">{{cite web |url=http://mod.nic.in/samachar/16feb01/html/mart.htm |title=Arms and the Men on Rajpath |author=Chandra Mohan, A. |date=16 February 2001 |work=Sainik Samachar |publisher=Ministry of Defence, India |access-date=2 December 2011 |archive-url=https://web.archive.org/web/20100726220901/http://mod.nic.in/samachar/16feb01/html/mart.htm |archive-date=26 July 2010 |url-status=dead}}</ref> The serial production of the Arjun main battle tank began in 2003 at [[Heavy Vehicles Factory|HVF Avadi]]. The first tank equipped with the BEL developed Integrated Fire Control System (IFCS), ballistic computer and gunner's main sight, was rolled out in 2004 and delivered in the first batch of five Arjun tanks on 7&nbsp;August 2004.<ref>{{cite book|url=https://www.mod.gov.in/sites/default/files/MOD-English2004.pdf|title=Annual report 2003-04|publisher=[[Ministry of Defence (India)]]|year=2003|page=121}}</ref><ref name=":7">{{cite book|url=https://www.mod.gov.in/sites/default/files/MOD-English2005_0.pdf|title=Annual report 2004-05|publisher=MoD|year=2004|pages=80–107}}</ref> The first tranche of production version Arjun tanks was delivered to the 43rd Armoured Regiment in 2004. By 2009, two armoured regiments had been equipped with the vehicle.<ref name="43AR"/><ref>{{Cite web|url=https://www.ndtv.com/blog/why-the-armys-arjun-tank-may-be-its-best-bet-yet-1797209|author=Som, Vishnu |title=Blog: Why The Army's Arjun Tank May Be Its Best Bet Yet|website=[[NDTV.com]]|access-date=10 March 2020}}</ref> The first test firing of the [[LAHAT]]-launched (Laser Homing Attack or Laser Homing Anti-Tank gun) anti-tank guided missile was carried out in 2004.<ref name=":7"/>
One Arjun tank (PPS-15) operated by the [[43rd Armoured Regiment (India)|43rd Armoured Regiment]] made a public appearance in the 1997 and 2001 [[Delhi Republic Day parade|Republic Day Parade]]s.<ref name=":1"/><ref name="RDPArade2001">{{cite web |url=http://mod.nic.in/samachar/16feb01/html/mart.htm |title=Arms and the Men on Rajpath |author=Chandra Mohan, A. |date=16 February 2001 |work=Sainik Samachar |publisher=Ministry of Defence, India |access-date=2 December 2011 |archive-url=https://web.archive.org/web/20100726220901/http://mod.nic.in/samachar/16feb01/html/mart.htm |archive-date=26 July 2010 |url-status=dead}}</ref> The serial production of the Arjun main battle tank began in 2003 at [[Heavy Vehicles Factory|HVF Avadi]]. The first tank equipped with the BEL developed Integrated Fire Control System (IFCS), ballistic computer and gunner's main sight, was rolled out in 2004 and delivered in the first batch of five Arjun tanks on 7&nbsp;August 2004.<ref>{{cite book|url=https://www.mod.gov.in/sites/default/files/MOD-English2004.pdf|title=Annual report 2003-04|publisher=[[Ministry of Defence (India)]]|year=2003|page=121}}</ref><ref name=":7">{{cite book|url=https://www.mod.gov.in/sites/default/files/MOD-English2005_0.pdf|title=Annual report 2004-05|publisher=MoD|year=2004|pages=80–107}}</ref> The first tranche of production version Arjun tanks was delivered to the [[43rd Armoured Regiment (India)|43rd Armoured Regiment]] in 2004. By 2009, two armoured regiments had been equipped with the vehicle. The two regiments with Arjun MBT were 43rd and [[75th Armoured Regiment (India)|75th Armoured Regiment]].<ref name="43AR"/><ref>{{Cite web|url=https://www.ndtv.com/blog/why-the-armys-arjun-tank-may-be-its-best-bet-yet-1797209|author=Som, Vishnu |title=Blog: Why The Army's Arjun Tank May Be Its Best Bet Yet|website=[[NDTV.com]]|access-date=10 March 2020}}</ref> The first test firing of the [[LAHAT]]-launched (Laser Homing Attack or Laser Homing Anti-Tank gun) anti-tank guided missile was carried out in 2004.<ref name=":7"/>


By 2006, unit maintenance and unit repair vehicles developed for the Arjun-equipped regiments had been cleared for induction.<ref>{{cite book|url=https://www.mod.gov.in/sites/default/files/MOD-English2007_0.pdf|title=Annual report 2006-07|publisher=MoD|page=79}}</ref> In 2008, a multi-purpose mobile camouflage system (MCS), developed as part of the Defensive Aid System (DAS) project, had been completed successfully. Field evaluation trials were conducted on the Arjun MK1 main battle tank in 2009.<ref>{{cite book|url=https://www.mod.gov.in/sites/default/files/AR-eng-2009_0.pdf|title=Annual report 2008-09|publisher=MoD|year=2008|page=90}}</ref><ref name=":8">{{Cite book|url=https://www.mod.gov.in/sites/default/files/AR910.pdf|title=Annual Report 2009-10|publisher=MoD|pages=84–94}}</ref> In 2009, an advanced laser warning countermeasure system (ALWCS) and a [[Fibre-optic gyroscope|fibre-optic gyro]]-based sensor package unit was developed and integrated on the Arjun MK1 main battle tank after field trials were carried out in two phases from May to August 2009.<ref name=":8"/> The first batch of the [[Armament Research & Development Establishment]] (ARDE) developed [[Recoil#Mounted guns|recoil system]] for the Arjun was delivered to the HVF Avadi after successful completion of field trials in 2009; the total order was for 124 systems.<ref name=":8"/>
By 2006, unit maintenance and unit repair vehicles developed for the Arjun-equipped regiments had been cleared for induction.<ref>{{cite book|url=https://www.mod.gov.in/sites/default/files/MOD-English2007_0.pdf|title=Annual report 2006-07|publisher=MoD|page=79}}</ref> In 2008, a multi-purpose mobile camouflage system (MCS), developed as part of the Defensive Aid System (DAS) project, had been completed successfully. Field evaluation trials were conducted on the Arjun MK1 main battle tank in 2009.<ref>{{cite book|url=https://www.mod.gov.in/sites/default/files/AR-eng-2009_0.pdf|title=Annual report 2008-09|publisher=MoD|year=2008|page=90}}</ref><ref name=":8">{{Cite book|url=https://www.mod.gov.in/sites/default/files/AR910.pdf|title=Annual Report 2009-10|publisher=MoD|pages=84–94}}</ref> In 2009, an advanced laser warning countermeasure system (ALWCS) and a [[Fibre-optic gyroscope|fibre-optic gyro]]-based sensor package unit was developed and integrated on the Arjun MK1 main battle tank after field trials were carried out in two phases from May to August 2009.<ref name=":8"/> The first batch of the [[Armament Research & Development Establishment]] (ARDE) developed [[Recoil#Mounted guns|recoil system]] for the Arjun was delivered to the HVF Avadi after successful completion of field trials in 2009; the total order was for 124 systems.<ref name=":8"/>


In 2010, combat simulators (turret and driver simulators) developed for the Arjun had been inducted into the Army, its development was authorised in 2009.<ref>{{Cite news|others=Special Correspondent|date=2010-07-31|title=Simulator Training Centre for Arjun tank inaugurated|language=en-IN|work=[[The Hindu]]|url=https://www.thehindu.com/news/national/tamil-nadu/Simulator-Training-Centre-for-Arjun-tank-inaugurated/article16217181.ece|access-date=2021-06-29|issn=0971-751X}}</ref><ref name=":8"/> By June 2011, more than 100 tanks had been delivered to the Indian Army.<ref name=":3">{{citation |url=http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |title=Technology focus |journal=Technology Focus: Bulletin of Defence Research & Development Organisation |volume=19 |number=3 |date=June 2011 |publisher=DRDO |access-date=10 June 2011 |issn=0971-4413 |archive-url=https://web.archive.org/web/20110809042539/http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |archive-date=9 August 2011 |url-status=dead}}</ref> The delivery of all 124 tanks was completed by mid-2012.<ref name=":10">{{Cite book|url=https://www.mod.gov.in/sites/default/files/AR1112.pdf|title=Annual Report 2011-12|publisher=MoD|page=104}}</ref> From 2013 to 2015, 75% of the Arjun tanks had to be grounded because of a lack of spare parts. By 2016, this problem had been rectified, and the tanks returned to active service.<ref name=":2"/>
In 2010, combat simulators (turret and driver simulators) developed for the Arjun had been inducted into the Army, its development was authorised in 2009.<ref>{{Cite news|date=2010-07-31|title=Simulator Training Centre for Arjun tank inaugurated|language=en-IN|work=[[The Hindu]]|url=https://www.thehindu.com/news/national/tamil-nadu/Simulator-Training-Centre-for-Arjun-tank-inaugurated/article16217181.ece|access-date=2021-06-29|issn=0971-751X}}</ref><ref name=":8"/> By June 2011, more than 100 tanks had been delivered to the Indian Army.<ref name=":3">{{citation |url=http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |title=Technology focus |journal=Technology Focus: Bulletin of Defence Research & Development Organisation |volume=19 |number=3 |date=June 2011 |publisher=DRDO |access-date=10 June 2011 |issn=0971-4413 |archive-url=https://web.archive.org/web/20110809042539/http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |archive-date=9 August 2011 |url-status=dead}}</ref> The delivery of all 124 tanks was completed by mid-2012.<ref name=":10">{{Cite book|url=https://www.mod.gov.in/sites/default/files/AR1112.pdf|title=Annual Report 2011-12|publisher=MoD|page=104}}</ref> From 2013 to 2015, 75% of the Arjun tanks had to be grounded because of a lack of spare parts. By 2016, this problem had been rectified, and the tanks returned to active service.<ref name=":2"/>


=== Upgrades ===
=== Upgrades ===
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As part of the developmental trials, the first phase of the LAHAT gun-launched anti-tank guided missile firing trials were carried out by 2013.<ref name=":26">{{Cite book|url=https://www.mod.gov.in/sites/default/files/AR1314.pdf|title=Annual Report 2013-14|publisher=MoD|pages=91–98}}</ref><ref name=":11"/> In 2015, DRDO developed an Integrated Automotive Vetronics System (IAVS) that was integrated into the Arjun&nbsp;MK2 prototype tank. Field trials were carried out over {{convert|430|km}} under harsh environmental conditions.<ref name=":20">{{Cite book|url=https://www.mod.gov.in/sites/default/files/AR1516.pdf|title=Annual Report 2015-16|publisher=MoD|page=84}}</ref><ref name=":19">{{Cite web|title=Integrated Automotive Vetronics System for AFVs (IAVS)|url=https://www.drdo.gov.in/integrated-automotive-vetronics-system-afvs-iavs|url-status=live|archive-url=https://web.archive.org/web/20210807170240/https://www.drdo.gov.in/integrated-automotive-vetronics-system-afvs-iavs|archive-date=7 August 2021|access-date=2021-06-30|website=Defence Research and Development Organisation (DRDO), Ministry of Defence, Government of India}}</ref> In 2014 and 2016, two new rounds, Penetration-Cum-Blast and Thermobaric, were developed for the Arjun tank and successfully tested. Impact assessments were also carried out with instruments to measure shock and blast pressure.<ref>{{Cite book|url=https://www.mod.gov.in/sites/default/files/AR1617.pdf|title=Annual Report 2016-17|publisher=MoD|page=82}}</ref>
As part of the developmental trials, the first phase of the LAHAT gun-launched anti-tank guided missile firing trials were carried out by 2013.<ref name=":26">{{Cite book|url=https://www.mod.gov.in/sites/default/files/AR1314.pdf|title=Annual Report 2013-14|publisher=MoD|pages=91–98}}</ref><ref name=":11"/> In 2015, DRDO developed an Integrated Automotive Vetronics System (IAVS) that was integrated into the Arjun&nbsp;MK2 prototype tank. Field trials were carried out over {{convert|430|km}} under harsh environmental conditions.<ref name=":20">{{Cite book|url=https://www.mod.gov.in/sites/default/files/AR1516.pdf|title=Annual Report 2015-16|publisher=MoD|page=84}}</ref><ref name=":19">{{Cite web|title=Integrated Automotive Vetronics System for AFVs (IAVS)|url=https://www.drdo.gov.in/integrated-automotive-vetronics-system-afvs-iavs|url-status=live|archive-url=https://web.archive.org/web/20210807170240/https://www.drdo.gov.in/integrated-automotive-vetronics-system-afvs-iavs|archive-date=7 August 2021|access-date=2021-06-30|website=Defence Research and Development Organisation (DRDO), Ministry of Defence, Government of India}}</ref> In 2014 and 2016, two new rounds, Penetration-Cum-Blast and Thermobaric, were developed for the Arjun tank and successfully tested. Impact assessments were also carried out with instruments to measure shock and blast pressure.<ref>{{Cite book|url=https://www.mod.gov.in/sites/default/files/AR1617.pdf|title=Annual Report 2016-17|publisher=MoD|page=82}}</ref>


In the meantime, the Arjun MK2 variant was redesignated as the Arjun&nbsp;MK1A. By 2018, two Arjun&nbsp;MK1A prototypes had been built and completed user trials by the end of the year.<ref name=":13"/>
In the meantime, the Arjun MK2 variant was redesignated as the Arjun&nbsp;Mk1A. By 2018, two Arjun&nbsp;Mk1A prototypes had been built and completed user trials by the end of the year.<ref name=":13"/> In May 2023, it's reported that the Mk1A will have 72 new features.<Ref>{{cite web|url=https://www.janes.com/osint-insights/defence-news/defence/parting-shot-arjun-mk-1a-main-battle-tank|title=Parting shot: Arjun Mk 1A main battle tank|date=2023-05-13|publisher=Janes|author=Kapil Kajal|archiveurl=https://web.archive.org/web/20240622102452/https://www.janes.com/osint-insights/defence-news/defence/parting-shot-arjun-mk-1a-main-battle-tank|archivedate=2024-06-22|accessdate=2024-06-22}}</ref>
 
In February 2024, DRDO reported that deliveries of the Mk1A are facing delays because of shortages of tank engines.<ref>{{cite web | url=https://www.janes.com/defence-news/industry-headlines/latest/indias-arjun-mk-1a-programme-faces-delay | title=India's Arjun Mk 1A programme faces delay | date=21 February 2024 }}</ref>
 
In June 2025, [[BEML]] entered into an agreement with DRDO's [[VRDE]] to manufacture Unit Repair Vehicle (URV), Unit Maintenance Vehicle (UMV) and Full Trailer for 70T Tank Transporter equipped with an Advanced Hydraulic Suspension System for Arjun MBT.<ref>{{Cite news |date=2025-06-09 |title=BEML signs agreement with DRDO to manufacture combat support vehicle |url=https://www.business-standard.com/companies/news/beml-signs-agreement-with-drdo-to-manufacture-combat-support-vehicle-125060901295_1.html |access-date=2025-06-09 |work=Business Standard}}</ref><ref>{{Cite news |last=Singh |first=Navdeep |date=2025-06-10 |title=BEML shares in focus after licensing deal With DRDO to manufacture advanced combat support vehicles for Army |url=https://economictimes.indiatimes.com/markets/stocks/news/beml-shares-in-focus-after-licensing-deal-with-drdo-to-manufacture-advanced-combat-support-vehicles-for-army/articleshow/121742359.cms?from=mdr |access-date=2025-06-11 |work=The Economic Times |issn=0013-0389}}</ref><ref>{{Cite news |date=2025-06-08 |title=DRDO transfers technologies of nine systems to 10 industries |url=https://www.pib.gov.in/PressReleasePage.aspx?PRID=2134995 |access-date=2025-06-09 |work=[[Press Information Bureau]]}}</ref>


==Design==
==Design==
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====Primary====
====Primary====
The Arjun main battle tank has a 120&nbsp;mm rifled gun fitted with an ARDE-developed ([[Armament Research and Development Establishment]]) [[Recoil#Mounted guns|recoil system]], muzzle reference system and [[fume extractor]], which can fire a variety of guided or unguided anti-armour munitions.<ref name=":21">{{Cite web|title=Arjun|url=https://fas.org/man/dod-101/sys/land/row/arjun.htm|url-status=live|archive-url=https://web.archive.org/web/20210816081603/https://fas.org/man/dod-101/sys/land/row/arjun.htm|archive-date=16 August 2021|access-date=2021-07-02}}</ref> The main gun is made from high strength [[electro-slag remelting]] (ESR) steel which is insulated with a [[thermal sleeve]] and [[autofrettage]]d to withstand higher pressure.<ref name=":3"/><ref name=":27"/> The newer Arjun&nbsp;MK1A variant retains the 120&nbsp;mm rifled gun with improved barrel,<ref name=":27"/> although India has developed a 125&nbsp;mm [[Smoothbore|smoothbore gun]] for the T-90 tank, which is under license for production.<ref name=":4"/><ref>{{Cite web|date=2021-02-18|title=Explained: What is special about the Arjun Main Battle Tank MK-1A?|url=https://indianexpress.com/article/explained/explained-what-is-the-arjun-main-battle-tank-mk-1a-7188226/|url-status=live|archive-url=https://web.archive.org/web/20210816082527/https://indianexpress.com/article/explained/explained-what-is-the-arjun-main-battle-tank-mk-1a-7188226/|archive-date=2021-08-16|access-date=2021-06-23|website=[[The Indian Express]]|language=en}}</ref><ref name="ET14Jul2018">{{cite news|date=14 July 2018|title=Necessary changes made to main battle tank Arjun Mark II: DRDO|newspaper=Economic Times|url=https://economictimes.indiatimes.com/news/defence/necessary-changes-made-to-main-battle-tank-arjun-mark-ii-drdo/articleshow/61177561.cms|url-status=live|access-date=2 June 2021|archive-url=https://web.archive.org/web/20210605130816if_/https://economictimes.indiatimes.com/news/defence/necessary-changes-made-to-main-battle-tank-arjun-mark-ii-drdo/articleshow/61177561.cms|archive-date=16 August 2021}}</ref>  
The Arjun main battle tank has a 120&nbsp;mm rifled gun fitted with an ARDE-developed ([[Armament Research and Development Establishment]]) [[Recoil#Mounted guns|recoil system]], muzzle reference system and [[fume extractor]], which can fire a variety of guided or unguided anti-armour munitions.<ref name=":21">{{Cite web|title=Arjun|url=https://fas.org/man/dod-101/sys/land/row/arjun.htm|url-status=live|archive-url=https://web.archive.org/web/20210816081603/https://fas.org/man/dod-101/sys/land/row/arjun.htm|archive-date=16 August 2021|access-date=2021-07-02}}</ref> The main gun is made from high strength [[electro-slag remelting]] (ESR) steel which is insulated with a [[thermal sleeve]] and [[autofrettage]]d to withstand higher pressure.<ref name=":3"/><ref name=":27"/> The newer Arjun&nbsp;Mk1A variant retains the 120&nbsp;mm rifled gun with improved barrel,<ref name=":27"/> although India has developed a 125&nbsp;mm [[Smoothbore|smoothbore gun]] for the T-90 tank, which is under license for production.<ref name=":4"/><ref>{{Cite web|date=2021-02-18|title=Explained: What is special about the Arjun Main Battle Tank MK-1A?|url=https://indianexpress.com/article/explained/explained-what-is-the-arjun-main-battle-tank-mk-1a-7188226/|url-status=live|archive-url=https://web.archive.org/web/20210816082527/https://indianexpress.com/article/explained/explained-what-is-the-arjun-main-battle-tank-mk-1a-7188226/|archive-date=2021-08-16|access-date=2021-06-23|website=[[The Indian Express]]|language=en}}</ref><ref name="ET14Jul2018">{{cite news|date=14 July 2018|title=Necessary changes made to main battle tank Arjun Mark II: DRDO|newspaper=Economic Times|url=https://economictimes.indiatimes.com/news/defence/necessary-changes-made-to-main-battle-tank-arjun-mark-ii-drdo/articleshow/61177561.cms|url-status=live|access-date=2 June 2021|archive-url=https://web.archive.org/web/20210605130816if_/https://economictimes.indiatimes.com/news/defence/necessary-changes-made-to-main-battle-tank-arjun-mark-ii-drdo/articleshow/61177561.cms|archive-date=5 June 2021}}</ref>  
[[File:Arjuntankammo.png|thumb|Arjun Tank ammunition, from left to right: APFSDS—designated locally as ''FSAPDS'', HESH, TB, and PCB rounds]]
[[File:Arjuntankammo.png|thumb|Arjun Tank ammunition, from left to right: APFSDS—designated locally as ''FSAPDS'', HESH, TB, and PCB rounds]]
The Arjun MK1 can fire several types of munitions, including indigenously developed [[armour-piercing fin-stabilized discarding sabot]] (APFSDS) and dual purpose [[high-explosive squash head]] (HESH) rounds. The Arjun MK1 can carry a mix of 42 APFSDS and HESH rounds in blast-proof canisters with blow out panels.<ref>{{Cite web|title=Arjun Main Battle Tank specifications|url=https://ofb.gov.in/product/products/product-details/arjun---main-battle-tank|url-status=live|archive-url=https://web.archive.org/web/20210805102938/https://ofb.gov.in/product/products/product-details/arjun---main-battle-tank|archive-date=16 August 2021|access-date=5 August 2021|website=OFB}}</ref><ref name=":3"/> In 2017, the Mark&nbsp;2 variant of the APFSDS with a long rod tungsten alloy penetrator was developed and successfully tested by ARDE for the new Alpha variant of the Arjun (MK1A).<ref name=":25">{{Cite book|title=Arjun MBT: An Indian Success Story|publisher=Desidoc|year=2017|isbn=9788186514962|location=Delhi|page=175}}</ref> The new APFSDS Mark&nbsp;2 round reportedly has improved penetration compared to the extant Mark&nbsp;1 round.<ref>{{cite web|title=User trials of 120 mm FSAPDS MK – II ammunition completed successfully|url=https://tdf.drdo.gov.in/technology_updates/index/7|url-status=live|archive-url=https://web.archive.org/web/20210223061703/https://tdf.drdo.gov.in/technology_updates/index/7|archive-date=23 February 2021|access-date=18 July 2021|website=tdf.drdo.gov.in|publisher=DRDO}}</ref><ref name=":25"/> In addition to the existing rounds, the ARDE also developed and successfully tested two high explosive 120&nbsp;mm rounds for the Arjun: Penetration Cum Blast (PCB) and [[Thermobaric weapon|Thermobaric]] (TB) Ammunition for urban warfare, which can be fired from existing MK1 and newer MK1A tanks.<ref name="DRDO_PCB&TB">{{cite web|date=14 September 2019|title=120 mm Penetration Cum Blast (PCB) AND Thermobaric (TB) Ammunition For MBT Arjun|url=https://www.drdo.gov.in/120-mm-penetration-cum-blast-pcb-and-thermobaric-tb-ammunition-mbt-arjun|url-status=live|publisher=DRDO, India|access-date=2 June 2021|archive-url=https://web.archive.org/web/20210526092959/https://www.drdo.gov.in/120-mm-penetration-cum-blast-pcb-and-thermobaric-tb-ammunition-mbt-arjun|archive-date=26 May 2021}}</ref><ref name="ET14July2018">{{cite news|date=14 July 2018|title=Fire-power of DRDO's Arjun Tank takes quantum jump with new ammunition: MoD|website=Economic Times|url=https://economictimes.indiatimes.com/news/defence/fire-power-of-drdos-arjun-tank-takes-quantum-jump-with-new-ammunition-mod/articleshow/50514955.cms|access-date=4 June 2021|archive-url=https://web.archive.org/web/20210816084046/https://economictimes.indiatimes.com/news/defence/fire-power-of-drdos-arjun-tank-takes-quantum-jump-with-new-ammunition-mod/articleshow/50514955.cms|archive-date=16 August 2021}}</ref>
The Arjun MK1 can fire several types of munitions, including indigenously developed [[armour-piercing fin-stabilized discarding sabot]] (APFSDS) and dual purpose [[high-explosive squash head]] (HESH) rounds. The Arjun MK1 can carry a mix of 42 APFSDS and HESH rounds in blast-proof canisters with blow out panels.<ref>{{Cite web|title=Arjun Main Battle Tank specifications|url=https://ofb.gov.in/product/products/product-details/arjun---main-battle-tank|url-status=live|archive-url=https://web.archive.org/web/20210805102938/https://ofb.gov.in/product/products/product-details/arjun---main-battle-tank|archive-date=5 August 2021|access-date=5 August 2021|website=OFB}}</ref><ref name=":3"/> In 2017, the Mark&nbsp;2 variant of the APFSDS with a long rod tungsten alloy penetrator was developed and successfully tested by ARDE for the new Alpha variant of the Arjun (Mk1A).<ref name=":25">{{Cite book|title=Arjun MBT: An Indian Success Story|publisher=Desidoc|year=2017|isbn=9788186514962|location=Delhi|page=175}}</ref> The new APFSDS Mark&nbsp;2 round reportedly has improved penetration compared to the extant Mark&nbsp;1 round.<ref>{{cite web|title=User trials of 120 mm FSAPDS MK – II ammunition completed successfully|url=https://tdf.drdo.gov.in/technology_updates/index/7|url-status=live|archive-url=https://web.archive.org/web/20210223061703/https://tdf.drdo.gov.in/technology_updates/index/7|archive-date=23 February 2021|access-date=18 July 2021|website=tdf.drdo.gov.in|publisher=DRDO}}</ref><ref name=":25"/> In addition to the existing rounds, the ARDE also developed and successfully tested two high explosive 120&nbsp;mm rounds for the Arjun: Penetration Cum Blast (PCB) and [[Thermobaric weapon|Thermobaric]] (TB) Ammunition for urban warfare, which can be fired from existing MK1 and newer Mk1A tanks.<ref name="DRDO_PCB&TB">{{cite web|date=14 September 2019|title=120 mm Penetration Cum Blast (PCB) AND Thermobaric (TB) Ammunition For MBT Arjun|url=https://www.drdo.gov.in/120-mm-penetration-cum-blast-pcb-and-thermobaric-tb-ammunition-mbt-arjun|url-status=live|publisher=DRDO, India|access-date=2 June 2021|archive-url=https://web.archive.org/web/20210526092959/https://www.drdo.gov.in/120-mm-penetration-cum-blast-pcb-and-thermobaric-tb-ammunition-mbt-arjun|archive-date=26 May 2021}}</ref><ref name="ET14July2018">{{cite news|date=14 July 2018|title=Fire-power of DRDO's Arjun Tank takes quantum jump with new ammunition: MoD|website=Economic Times|url=https://economictimes.indiatimes.com/news/defence/fire-power-of-drdos-arjun-tank-takes-quantum-jump-with-new-ammunition-mod/articleshow/50514955.cms|access-date=4 June 2021|archive-url=https://web.archive.org/web/20210816084046/https://economictimes.indiatimes.com/news/defence/fire-power-of-drdos-arjun-tank-takes-quantum-jump-with-new-ammunition-mod/articleshow/50514955.cms|archive-date=16 August 2021}}</ref>


=====SAMHO=====
=====SAMHO=====
{{Main|SAMHO (missile)}}
{{Main|SAMHO (missile)}}
To enhance the firepower of the Arjun, DRDO earlier considered equipping the tank with a [[LAHAT]] gun-launched anti-tank guided missile, but in 2014, it was announced the plan had been dropped. In the same year, DRDO announced the development of an Indian-made, gun-launched guided missile under Cannon Launched Guided Missile Programme (CLMDP), the [[SAMHO (missile)|SAMHO]].<ref name=":11">{{Cite web|last=Singh|first=Rahul|date=2014-09-21|title=India drops Israeli missile for Arjun Tank|url=https://www.hindustantimes.com/india/india-drops-israeli-missile-for-arjun-tank/story-OswmqbSCKEEHEqcbnqmDxM.html|url-status=live|archive-url=https://web.archive.org/web/20210816084450/https://www.hindustantimes.com/india/india-drops-israeli-missile-for-arjun-tank/story-OswmqbSCKEEHEqcbnqmDxM.html|archive-date=16 August 2021|access-date=2021-06-24|website=Hindustan Times|language=en}}</ref> In 2020, DRDO successfully test fired SAMHO from an Arjun main battle tank.<ref name=":5">{{Cite news|others=Special Correspondent|date=2020-09-23|title=DRDO test fires laser guided anti-tank missile|language=en-IN|work=The Hindu|url=https://www.thehindu.com/news/national/drdo-successfully-test-fires-laser-guided-anti-tank-guided-missile/article32676820.ece|access-date=2021-06-24|archive-url=https://web.archive.org/web/20210816084640/https://www.thehindu.com/news/national/drdo-successfully-test-fires-laser-guided-anti-tank-guided-missile/article32676820.ece|archive-date=16 August 2021|issn=0971-751X}}</ref>
To enhance the firepower of the Arjun, DRDO earlier considered equipping the tank with a [[LAHAT]] gun-launched anti-tank guided missile, but in 2014, it was announced the plan had been dropped. In the same year, DRDO announced the development of an Indian-made, gun-launched guided missile under Cannon Launched Guided Missile Programme (CLMDP), the [[SAMHO (missile)|SAMHO]].<ref name=":11">{{Cite web|last=Singh|first=Rahul|date=2014-09-21|title=India drops Israeli missile for Arjun Tank|url=https://www.hindustantimes.com/india/india-drops-israeli-missile-for-arjun-tank/story-OswmqbSCKEEHEqcbnqmDxM.html|url-status=live|archive-url=https://web.archive.org/web/20210816084450/https://www.hindustantimes.com/india/india-drops-israeli-missile-for-arjun-tank/story-OswmqbSCKEEHEqcbnqmDxM.html|archive-date=16 August 2021|access-date=2021-06-24|website=Hindustan Times|language=en}}</ref> In 2020, DRDO successfully test fired SAMHO from an Arjun main battle tank.<ref name=":5">{{Cite news|date=2020-09-23|title=DRDO test fires laser guided anti-tank missile|language=en-IN|work=The Hindu|url=https://www.thehindu.com/news/national/drdo-successfully-test-fires-laser-guided-anti-tank-guided-missile/article32676820.ece|access-date=2021-06-24|archive-url=https://web.archive.org/web/20210816084640/https://www.thehindu.com/news/national/drdo-successfully-test-fires-laser-guided-anti-tank-guided-missile/article32676820.ece|archive-date=16 August 2021|issn=0971-751X}}</ref>


ARDE developed the SAMHO missile in association with the [[High Energy Materials Research Laboratory]] (HEMRL) and the [[Instruments Research and Development Establishment]] (IRDE).<ref name=":6">{{Cite web|last=[[Press Trust of India]]|date=2020-10-01|title=DRDO successfully test fires laser-guided anti-tank guided missile from Arjun Tank|url=https://indianexpress.com/article/world/drdo-successfully-test-fires-laser-guided-anti-tank-guided-missile-from-arjun-tank-6663728/|url-status=live|archive-url=https://web.archive.org/web/20210816084918/https://indianexpress.com/article/world/drdo-successfully-test-fires-laser-guided-anti-tank-guided-missile-from-arjun-tank-6663728/|archive-date=16 August 2021|access-date=2021-06-24|website=The Indian Express|language=en}}</ref> The SAMHO guided missile has two [[high-explosive anti-tank]] (HEAT) [[tandem-charge]] warheads designed to defeat [[Reactive armour#Explosive reactive armour|explosive reactive armour]] (ERA) protection.<ref name=":5"/> The SAMHO is a dual purpose guided missile which can engage and neutralise [[armoured fighting vehicle]]s, tanks, and low flying targets such as [[attack helicopter]]s at a minimum range of {{convert|1.5|km}} and maximum range of up to {{convert|5|km}}.<ref name=":6"/><ref>{{Cite web|title=Cannon Launched Missile Development Programme (CLMDP)|url=https://www.drdo.gov.in/cannon-launched-missile-development-programmeclmdp|url-status=live|archive-url=https://web.archive.org/web/20210816085145/https://www.drdo.gov.in/cannon-launched-missile-development-programmeclmdp|archive-date=16 August 2021|access-date=2020-09-23|website=Defence Research and Development Organisation (DRDO), Government of India}}</ref>
ARDE developed the SAMHO missile in association with the [[High Energy Materials Research Laboratory]] (HEMRL) and the [[Instruments Research and Development Establishment]] (IRDE).<ref name=":6">{{Cite web|last=[[Press Trust of India]]|date=2020-10-01|title=DRDO successfully test fires laser-guided anti-tank guided missile from Arjun Tank|url=https://indianexpress.com/article/world/drdo-successfully-test-fires-laser-guided-anti-tank-guided-missile-from-arjun-tank-6663728/|url-status=live|archive-url=https://web.archive.org/web/20210816084918/https://indianexpress.com/article/world/drdo-successfully-test-fires-laser-guided-anti-tank-guided-missile-from-arjun-tank-6663728/|archive-date=16 August 2021|access-date=2021-06-24|website=The Indian Express|language=en}}</ref> The SAMHO guided missile has two [[high-explosive anti-tank]] (HEAT) [[tandem-charge]] warheads designed to defeat [[Reactive armour#Explosive reactive armour|explosive reactive armour]] (ERA) protection.<ref name=":5"/> The SAMHO is a dual purpose guided missile which can engage and neutralise [[armoured fighting vehicle]]s, tanks, and low flying targets such as [[attack helicopter]]s at a minimum range of {{convert|1.5|km}} and maximum range of up to {{convert|5|km}}.<ref name=":6"/><ref>{{Cite web|title=Cannon Launched Missile Development Programme (CLMDP)|url=https://www.drdo.gov.in/cannon-launched-missile-development-programmeclmdp|url-status=live|archive-url=https://web.archive.org/web/20210816085145/https://www.drdo.gov.in/cannon-launched-missile-development-programmeclmdp|archive-date=16 August 2021|access-date=2020-09-23|website=Defence Research and Development Organisation (DRDO), Government of India}}</ref>


====Secondary====
====Secondary====
[[File:Arjun Mk IIRCWS.png|thumb|[[Remote controlled weapon station]] on Arjun MK1A]]
[[File:Arjun Mk IIRCWS.png|thumb|[[Remote controlled weapon station]] on Arjun Mk1A]]
In addition to the main gun, the Arjun has two [[machine gun]]s:
In addition to the main gun, the Arjun has two [[machine gun]]s:
# A 12.7&nbsp;mm [[NSV machine gun|NSV heavy machine gun]] mounted in front of the gunner's hatch for engaging armoured vehicles, low flying aircraft and attack helicopters. In the Arjun&nbsp;MK1 it is operated manually while in MK1A it has been replaced with a remotely operated gun turret which can be operated from inside the tank without exposing personnel to the hostile battlefield.<ref name="DRDO1">[http://www.drdo.org/mbt.html Main Battle Tank, Arjun] {{Webarchive|url=https://web.archive.org/web/20080928094309/http://www.drdo.org/mbt.html |date=28 September 2008}}, Defence Research & Development Organisation (DRDO), Ministry of Defence, India</ref>
# A 12.7&nbsp;mm [[NSV machine gun|NSV heavy machine gun]] mounted in front of the gunner's hatch for engaging armoured vehicles, low flying aircraft and attack helicopters. In the Arjun&nbsp;MK1 it is operated manually while in Mk1A it has been replaced with a remotely operated gun turret which can be operated from inside the tank without exposing personnel to the hostile battlefield.<ref>{{Cite news |date=2018-07-14 |title=BEL unveils new weapon system for Arjun battle tank |url=https://economictimes.indiatimes.com/news/defence/bel-unveils-new-weapon-system-for-arjun-battle-tank/articleshow/57146386.cms?from=mdr |access-date=2024-07-10 |work=The Economic Times |issn=0013-0389}}</ref> The MKII variant has a RCWS made by Bharat Electronics Ltd (BEL).<ref>{{cite web|url=https://www.electronicsforyou.biz/industry-buzz/bel-launches-remote-controlled-weapon-station-mbt-arjun-mk-ii/|title=BEL launches remote controlled weapon station for MBT Arjun Mk II|author=Baishakhi Dutta|date=2017-02-15}}</ref>
# A [[7.62×51mm NATO|7.62 mm]] machine gun in a [[Weapon mount#Coaxial|coaxial weapon mount.]]<ref name=":12"/>
# A [[7.62×51mm NATO|7.62 mm]] machine gun in a [[Weapon mount#Coaxial|coaxial weapon mount.]]<ref name=":12"/>


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The Arjun gunner's main sight has an integrated [[laser range finder]], day sight and thermal sight for day and night target recognition and engagement, and dual magnification and fibre-optic gyro based two-axis stabilisation.<ref name=":12"/> The sight is integrated with an automatic target tracking system developed by DRDO.<ref name=":15">{{Cite web|last=Chaitanya|first=SV Krishna|date=2019-12-09|title=Indigenously designed, Tanker Arjun reports for duty|url=https://www.newindianexpress.com/states/tamil-nadu/2019/dec/09/indigenously-designed-tanker-arjun-reports-for-duty-2073063.html|url-status=live|archive-url=https://web.archive.org/web/20210816134534/https://www.newindianexpress.com/states/tamil-nadu/2019/dec/09/indigenously-designed-tanker-arjun-reports-for-duty-2073063.html|archive-date=16 August 2021|access-date=2021-07-02|website=The New Indian Express}}</ref><ref name=":27"/>
The Arjun gunner's main sight has an integrated [[laser range finder]], day sight and thermal sight for day and night target recognition and engagement, and dual magnification and fibre-optic gyro based two-axis stabilisation.<ref name=":12"/> The sight is integrated with an automatic target tracking system developed by DRDO.<ref name=":15">{{Cite web|last=Chaitanya|first=SV Krishna|date=2019-12-09|title=Indigenously designed, Tanker Arjun reports for duty|url=https://www.newindianexpress.com/states/tamil-nadu/2019/dec/09/indigenously-designed-tanker-arjun-reports-for-duty-2073063.html|url-status=live|archive-url=https://web.archive.org/web/20210816134534/https://www.newindianexpress.com/states/tamil-nadu/2019/dec/09/indigenously-designed-tanker-arjun-reports-for-duty-2073063.html|archive-date=16 August 2021|access-date=2021-07-02|website=The New Indian Express}}</ref><ref name=":27"/>


The commander's panoramic sight operates independently of the turret. It is stabilised with a fibre-optic gyro, and has an integrated laser rangefinder, day sight with dual magnification and a thermal imaging camera for day and night all-weather 360-degree surveillance.<ref name=":10"/> The sight is also interfaced with the ballistic computer, which enables the commander to override the gunner to select and engage targets independently.<ref name=":10"/><ref name=":0"/> In addition to the laser rangefinder, the Arjun&nbsp;MK1A variant has an integrated laser target designator linked to the SAMHO gun-launched guided missile.<ref>{{Cite news|last=Peri|first=Dinakar|date=2020-12-26|title=Army to move Defence Ministry for 118 Arjun Mk-1A tanks|language=en-IN|work=The Hindu|url=https://www.thehindu.com/news/national/army-to-move-defence-ministry-for-118-arjun-mk-1a-tanks/article33425919.ece|access-date=2021-07-02|archive-url=https://web.archive.org/web/20210816134831/https://www.thehindu.com/news/national/army-to-move-defence-ministry-for-118-arjun-mk-1a-tanks/article33425919.ece|archive-date=16 August 2021|issn=0971-751X}}</ref>
The commander's panoramic sight operates independently of the turret. It is stabilised with a fibre-optic gyro, and has an integrated laser rangefinder, day sight with dual magnification and a thermal imaging camera for day and night all-weather 360-degree surveillance.<ref name=":10"/> The sight is also interfaced with the ballistic computer, which enables the commander to override the gunner to select and engage targets independently.<ref name=":10"/><ref name=":0"/> In addition to the laser rangefinder, the Arjun&nbsp;Mk1A variant has an integrated laser target designator linked to the SAMHO gun-launched guided missile.<ref>{{Cite news|last=Peri|first=Dinakar|date=2020-12-26|title=Army to move Defence Ministry for 118 Arjun Mk-1A tanks|language=en-IN|work=The Hindu|url=https://www.thehindu.com/news/national/army-to-move-defence-ministry-for-118-arjun-mk-1a-tanks/article33425919.ece|access-date=2021-07-02|archive-url=https://web.archive.org/web/20210816134831/https://www.thehindu.com/news/national/army-to-move-defence-ministry-for-118-arjun-mk-1a-tanks/article33425919.ece|archive-date=16 August 2021|issn=0971-751X}}</ref>


===Protection===
===Protection===
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The Arjun&nbsp;MK1 tanks are protected by an indigenously developed armour called [[Kanchan armour]], named after the city of Kanchanbagh, where the [[Defence Metallurgical Research Laboratory]] (DMRL) which designed and developed the armour is located.<ref name="Kanchan">{{cite web|last=Joseph|first=P. Chacko|date=24 September 2007|title=The Kanchan armour|url=http://frontierindia.net/the-kanchan-armor/|url-status=dead|archive-url=https://web.archive.org/web/20110725073043/http://frontierindia.net/the-kanchan-armor/|archive-date=25 July 2011|access-date=10 June 2011|publisher=Frontierindia.net}}</ref> Kanchan is a composite armour that consists of ceramic tiles and composite panels sandwiched between [[rolled homogeneous armour]] (RHA) plates. Its exact composition, the material used and the manufacturing processes are kept highly secret.<ref name="Kanchan"/> The armour was fielded on the Arjun after extensive evaluation trials carried out against a variety of modern anti-tank munitions, including APFSDS.<ref>{{Cite web|title=Armour Materials & Modules: MBTs and Other Combat Vehicles|url=https://www.drdo.gov.in/armour-materials-modules-mbts-and-other-combat-vehicles|access-date=2021-07-02|website=Defence Research and Development Organisation (DRDO), Ministry of Defence, Government of India}}</ref><ref name="Kanchan"/>
The Arjun&nbsp;MK1 tanks are protected by an indigenously developed armour called [[Kanchan armour]], named after the city of Kanchanbagh, where the [[Defence Metallurgical Research Laboratory]] (DMRL) which designed and developed the armour is located.<ref name="Kanchan">{{cite web|last=Joseph|first=P. Chacko|date=24 September 2007|title=The Kanchan armour|url=http://frontierindia.net/the-kanchan-armor/|url-status=dead|archive-url=https://web.archive.org/web/20110725073043/http://frontierindia.net/the-kanchan-armor/|archive-date=25 July 2011|access-date=10 June 2011|publisher=Frontierindia.net}}</ref> Kanchan is a composite armour that consists of ceramic tiles and composite panels sandwiched between [[rolled homogeneous armour]] (RHA) plates. Its exact composition, the material used and the manufacturing processes are kept highly secret.<ref name="Kanchan"/> The armour was fielded on the Arjun after extensive evaluation trials carried out against a variety of modern anti-tank munitions, including APFSDS.<ref>{{Cite web|title=Armour Materials & Modules: MBTs and Other Combat Vehicles|url=https://www.drdo.gov.in/armour-materials-modules-mbts-and-other-combat-vehicles|access-date=2021-07-02|website=Defence Research and Development Organisation (DRDO), Ministry of Defence, Government of India}}</ref><ref name="Kanchan"/>


The Arjun tanks are also protected with ultra-high strength low alloy DMR-1700 steel armour plates developed by the DMRL, which offer enhanced protection against [[kinetic energy penetrator]] projectiles such as APFSDS (125&nbsp;mm) rounds, over the existing RHA plates by a margin of 20 per cent and 25 per cent against 7.62&nbsp;mm and 12.7&nbsp;mm [[Armor-piercing bullet|armour-piercing projectiles]].<ref>{{Cite journal|last=Kutumbarao|first=V. V.|date=2020-10-13|title=DMR 1700 Low Cost High Performance Steel for Defence Applications|url=https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/16403|journal=Defence Science Journal|language=en|volume=70|issue=6|pages=701–702|issn=0976-464X}}</ref><ref>{{Cite journal|last1=Singh|first1=B Bhav|last2=G|first2=Sukumar|last3=Senthil|first3=P. Ponguru|last4=Jena|first4=P.K.|last5=Reddy|first5=P.R.S|last6=Kumar|first6=K. Siva|last7=Madhu|first7=V|last8=Reddy|first8=GM|date=June 2017|title=Future Armour Materials and Technologies for Combat Platforms|url=|journal=Defence Science Journal|publisher=Defence Scientific Information & Documentation Centre|volume=67| issue=4|pages=412–419|doi=10.14429/dsj.67.11468}}</ref>
The Arjun tanks are also protected with ultra-high strength low alloy DMR-1700 steel armour plates developed by the DMRL, which offer enhanced protection against [[kinetic energy penetrator]] projectiles such as APFSDS (125&nbsp;mm) rounds, over the existing RHA plates by a margin of 20 per cent and 25 per cent against 7.62&nbsp;mm and 12.7&nbsp;mm [[Armor-piercing bullet|armour-piercing projectiles]].<ref>{{Cite journal|last=Kutumbarao|first=V. V.|date=2020-10-13|title=DMR 1700 Low Cost High Performance Steel for Defence Applications|url=https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/16403|journal=Defence Science Journal|language=en|volume=70|issue=6|pages=701–702|issn=0976-464X}}</ref><ref>{{Cite journal|last1=Singh|first1=B Bhav|last2=G|first2=Sukumar|last3=Senthil|first3=P. Ponguru|last4=Jena|first4=P.K.|last5=Reddy|first5=P.R.S|last6=Kumar|first6=K. Siva|last7=Madhu|first7=V|last8=Reddy|first8=GM|date=June 2017|title=Future Armour Materials and Technologies for Combat Platforms|url=|journal=Defence Science Journal|publisher=Defence Scientific Information & Documentation Centre|volume=67| issue=4|pages=412–419|doi=10.14429/dsj.67.11468|issn=0011-748X |doi-access=free}}</ref>


The latest variant Arjun, the MK1A, has a completely redesigned turret protected with improved Kanchan armour with enhanced protection against large calibre [[Kinetic energy penetrator|kinetic energy projectile]]s,<ref name=":26"/> [[Reactive armour#Explosive reactive armour|explosive reactive armour]] (ERA) panels (ERA MK-II) on the turret, hull [[glacis]] and the side skirt. The MK1A also has [[non-explosive reactive armor|non-explosive reactive armour]] (NERA) protection.<ref name=":0"/><ref name=":14"/> The turret is redesigned to reduce its silhouette, thereby delaying detection at ranges using modern electro-optical sights.<ref name=":24">{{Cite web|last=Bedi|first=Rahul|date=2021-04-25|title=Why the Arjun MK-1A Main Battle Tank May Prove to Be a Costly Mistake for the Army|url=https://thewire.in/government/defence-arjun-mk-1a-main-battle-tanks-indian-army|url-status=live|archive-url=https://web.archive.org/web/20210911053210/https://thewire.in/government/defence-arjun-mk-1a-main-battle-tanks-indian-army|archive-date=11 September 2021|access-date=2021-07-02|website=The Wire}}</ref>
The latest variant Arjun, the Mk1A, has a completely redesigned turret protected with improved Kanchan armour with enhanced protection against large calibre [[Kinetic energy penetrator|kinetic energy projectile]]s,<ref name=":26"/> [[Reactive armour#Explosive reactive armour|explosive reactive armour]] (ERA) panels (ERA MK-II) on the turret, hull [[glacis]] and the side skirt. The Mk1A also has [[non-explosive reactive armor|non-explosive reactive armour]] (NERA) protection.<ref name=":0"/><ref name=":14"/> The turret is redesigned to reduce its silhouette, thereby delaying detection at ranges using modern electro-optical sights.<ref name=":24">{{Cite web|last=Bedi|first=Rahul|date=2021-04-25|title=Why the Arjun MK-1A Main Battle Tank May Prove to Be a Costly Mistake for the Army|url=https://thewire.in/government/defence-arjun-mk-1a-main-battle-tanks-indian-army|url-status=live|archive-url=https://web.archive.org/web/20210911053210/https://thewire.in/government/defence-arjun-mk-1a-main-battle-tanks-indian-army|archive-date=11 September 2021|access-date=2021-07-02|website=The Wire}}</ref>


The tank has [[CBRN defense|NBC protection]] and an [[Automatic fire suppression|automatic fire detection and suppression]] system for enhanced crew protection and survival.<ref name=":14">{{Cite web|last=Jain|first=Ayush|date=2021-04-26|title=Indian Army's Arjun Mk-1 Alpha Tanks 'Desert-Storms' India-Pakistan Border; Tests Firing Capability|url=https://eurasiantimes.com/watch-indian-armys-home-grown-arjun-mk-1a-tank-showcases-its-fire-power/|url-status=live|archive-url=https://web.archive.org/web/20210911053705/https://eurasiantimes.com/watch-indian-armys-home-grown-arjun-mk-1a-tank-showcases-its-fire-power/|archive-date=11 September 2021|access-date=2021-06-20|website=The Eurasian Times|language=en-US}}</ref>
The tank has [[CBRN defense|NBC protection]] and an [[Automatic fire suppression|automatic fire detection and suppression]] system for enhanced crew protection and survival.<ref name=":14">{{Cite web|last=Jain|first=Ayush|date=2021-04-26|title=Indian Army's Arjun Mk-1 Alpha Tanks 'Desert-Storms' India-Pakistan Border; Tests Firing Capability|url=https://eurasiantimes.com/watch-indian-armys-home-grown-arjun-mk-1a-tank-showcases-its-fire-power/|url-status=live|archive-url=https://web.archive.org/web/20210911053705/https://eurasiantimes.com/watch-indian-armys-home-grown-arjun-mk-1a-tank-showcases-its-fire-power/|archive-date=11 September 2021|access-date=2021-06-20|website=The Eurasian Times|language=en-US}}</ref>
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==== Defensive aid system ====
==== Defensive aid system ====
Passive protection is provided by a multi-purpose mobile camouflage system (MCS) developed by DRDO; it is integrated on Arjun tanks and evaluations were carried out in 2009.<ref name=":8"/> The Arjun also has anti-infrared/anti-thermal paints to reduce its IR signature.<ref name=":15"/>
Passive protection is provided by a multi-purpose mobile camouflage system (MCS) developed by DRDO; it is integrated on Arjun tanks and evaluations were carried out in 2009.<ref name=":8"/> The Arjun also has anti-infrared/anti-thermal paints to reduce its IR signature.<ref name=":15"/>
[[File:Arjun Mk II side(cropped1).jpg|thumb|One of the four all-bearing [[laser warning receiver]]s combined with [[Infrared countermeasure|IR jammer]] (top) and 360 degree independently rotating grenade launcher (bottom). Both are part of the ALWCS, and operate autonomously]]
[[File:Arjun Mk II side(cropped1).jpg|thumb|One of the four all-bearing [[laser warning receiver]]s combined with [[Infrared countermeasure|IR jammer]] (top) and 360 degree independently rotating smoke grenade launcher (bottom). Both are part of the ALWCS, and operate autonomously]]
Active protection is provided by the Advanced Laser Warning Countermeasure System (ALWCS), and consists of four laser warning receivers mounted on the top of the turret to provide 360-degree protection cover. The ALWCS alerts the crew and indicates the direction of a threat when a laser rangefinder/designator, IR illuminator is pointed at the tank.<ref>{{Cite web|date=2014-02-20|title=Israeli Hand in India's New Tank|url=https://www.israeldefense.co.il/en/content/israeli-hand-indias-new-tank|url-status=live|access-date=2021-07-02|website=Israel Defense|publisher=Arrowmedia Israel Ltd|language=en}}</ref> The ALWCS has integrated IR jammers and aerosol based smoke grenades to confuse the anti-tank guided munitions.
Active protection is provided by the Advanced Laser Warning Countermeasure System (ALWCS), and consists of four laser warning receivers mounted on the top of the turret to provide 360-degree protection cover. The ALWCS alerts the crew and indicates the direction of a threat when a laser rangefinder/designator, IR illuminator is pointed at the tank.<ref>{{Cite web|date=2014-02-20|title=Israeli Hand in India's New Tank|url=https://www.israeldefense.co.il/en/content/israeli-hand-indias-new-tank|access-date=2021-07-02|website=Israel Defense|publisher=Arrowmedia Israel Ltd|language=en}}</ref> The ALWCS has integrated IR jammers and aerosol based smoke grenades to confuse the anti-tank guided munitions.


The ALWCS is interfaced with the FCS of the Arjun tank, which autonomously rotates the grenade launcher in the direction of and perceived threat and fires aerosol smoke grenades.<ref name=":16">{{Cite web|title=Technologies and Products|url=https://www.drdo.gov.in/technology-cluster-links/labs-products-detail/2819/175|url-status=live|archive-url=https://web.archive.org/web/20210816135702/https://www.drdo.gov.in/technology-cluster-links/labs-products-detail/2819/175|archive-date=16 August 2021|access-date=2021-07-02|website=Defence Research and Development Organisation (DRDO), Ministry of Defence, Government of India}}</ref><ref name=":8"/> It has auto and manual modes of operation.<ref name=":16"/>
The ALWCS is interfaced with the FCS of the Arjun tank, which autonomously rotates the grenade launcher in the direction of and perceived threat and fires aerosol smoke grenades.<ref name=":16">{{Cite web|title=Technologies and Products|url=https://www.drdo.gov.in/technology-cluster-links/labs-products-detail/2819/175|url-status=live|archive-url=https://web.archive.org/web/20210816135702/https://www.drdo.gov.in/technology-cluster-links/labs-products-detail/2819/175|archive-date=16 August 2021|access-date=2021-07-02|website=Defence Research and Development Organisation (DRDO), Ministry of Defence, Government of India}}</ref><ref name=":8"/> It has auto and manual modes of operation.<ref name=":16"/>


==== Crew safety and protection ====
==== Crew safety and protection ====
The Arjun has a crew of four—commander, gunner, loader and driver. The Arjun's crew compartment is ergonomically designed for crew safety and comfort and is protected with armour and ERA.<ref name=":15"/> In Arjun MK1A, the driver's safety and comfort is enhanced with roof mounted seat to protect him from [[Shock wave]]s.<ref name=":27"/><ref name=":0"/> The Arjun's crew and engine compartments are equipped with an automatic fire detection and suppression system, which detects and suppresses fire within 200 milliseconds,<ref name=":21"/><ref name=":25">{{Cite book|title=Arjun MBT: An Indian Success Story|publisher=Desidoc|year=2017|isbn=9788186514962|location=Delhi|page=175}}</ref> while ammunition rounds are stored in a containerised ammunition bin with an individual shutter with blow off panels to mitigate the hazard caused by ammunition cook off.<ref name=":15"/><ref name=":27"/> The Arjun&nbsp;MK1A variant tank has a track-width mine plough to reduce the risk of anti-tank mines;<ref name=":27"/> the tank also has [[CBRN defense|NBC]] protection.<ref name=":15"/>
The Arjun has a crew of four—commander, gunner, loader and driver. The Arjun's crew compartment is ergonomically designed for crew safety and comfort and is protected with armour and ERA.<ref name=":15"/> In Arjun Mk1A, the driver's safety and comfort is enhanced with roof mounted seat to protect him from [[Shock wave]]s.<ref name=":27"/><ref name=":0"/> The Arjun's crew and engine compartments are equipped with an automatic fire detection and suppression system, which detects and suppresses fire within 200 milliseconds,<ref name=":21"/><ref name=":25">{{Cite book|title=Arjun MBT: An Indian Success Story|publisher=Desidoc|year=2017|isbn=9788186514962|location=Delhi|page=175}}</ref> while ammunition rounds are stored in a containerised ammunition bin with an individual shutter with blow off panels to mitigate the hazard caused by ammunition cook off.<ref name=":15"/><ref name=":27"/> The Arjun&nbsp;Mk1A variant tank has a track-width mine plough to reduce the risk of anti-tank mines;<ref name=":27"/> the tank also has [[CBRN defense|NBC]] protection.<ref name=":15"/>


===Mobility===
===Mobility===
The Arjun is a heavy main battle tank that moves on seven roadwheels on each side, supported by an indigenously developed [[Hydropneumatic suspension|hydropneumatic]] suspension system. Powered by an [[MTU Friedrichshafen|MTU]] 838 Ka 501 turbo charged 10 cylinder liquid cooled diesel engine with a rated power output of 1400&nbsp;hp at 2400&nbsp;rpm, the tank has a {{convert|70|km|adj=on}} top speed and a {{convert|40|km/h|adj=on}} cross country speed.<ref>{{Cite web|title=MBT Arjun Tank|url=https://www.drdo.gov.in/mbt-arjun-tank|url-status=live|archive-url=https://web.archive.org/web/20210911053952/https://www.drdo.gov.in/mbt-arjun-tank|archive-date=11 September 2021|access-date=2021-07-03|website=Defence Research and Development Organisation (DRDO), Ministry of Defence, Government of India}}</ref> The Arjun tank has a maximum fuel capacity of {{convert|1,610|L}}<ref name=":1"/> and a range of {{convert|450|km}}.<ref>{{Cite web|title=Arjun Main Battle Tank |url=http://www.military-today.com/tanks/arjun.htm|access-date=2021-08-15|website=Military-Today.com}}</ref>
The Arjun is a heavy main battle tank that moves on seven roadwheels on each side, supported by an indigenously developed [[Hydropneumatic suspension|hydropneumatic]] suspension system. Powered by an [[MTU Friedrichshafen|MTU]] 838 Ka 501 turbo charged 10 cylinder liquid cooled diesel engine with a rated power output of 1400&nbsp;hp at 2400&nbsp;rpm, the tank has a {{convert|70|km|adj=on}} top speed and a {{convert|40|km/h|adj=on}} cross country speed.<ref>{{Cite web|title=MBT Arjun Tank|url=https://www.drdo.gov.in/mbt-arjun-tank|url-status=live|archive-url=https://web.archive.org/web/20210911053952/https://www.drdo.gov.in/mbt-arjun-tank|archive-date=11 September 2021|access-date=2021-07-03|website=Defence Research and Development Organisation (DRDO), Ministry of Defence, Government of India}}</ref> The Arjun tank has a maximum fuel capacity of {{convert|1,610|L}}<ref name=":1"/> and a range of {{convert|450|km}}.<ref name="ambt"/>
 
The Arjun has a ground of clearance {{convert|0.45|m|in}},<ref name=":1" /><ref name=":21" /> and can ford through {{convert|2.15|m|adj=on}} deep water without using a snorkel. During this operation, air for fuel combustion is drawn through the commander's and loader's hatches.<ref name=":12" />


The latest Arjun&nbsp;MK1A variant retains the 1,400&nbsp;hp diesel powerplant but with a redesigned hydropneumatic suspension system and new advanced running gear system for optimal performance and efficiency.<ref name=":15"/><ref name=":27"/> Earlier Arjun tanks were equipped with tracks supplied by the German company, [[Diehl BGT Defence|Diehl]], but these were later replaced with tracks supplied by [[Larsen & Toubro]].<ref name=":24"/>
The latest Arjun&nbsp;Mk1A variant retains the 1,400&nbsp;hp diesel powerplant but with a redesigned hydropneumatic suspension system and new advanced running gear system for optimal performance and efficiency.<ref name=":15" /><ref name=":27" /> Earlier Arjun tanks were equipped with tracks supplied by the German company, [[Diehl BGT Defence|Diehl]], but these were later replaced with tracks supplied by [[Larsen & Toubro]].<ref name=":24" />


The Arjun has a ground of clearance {{convert|0.45|m|in}},<ref name=":1"/><ref name=":21"/> and can ford through {{convert|2.15|m|adj=on}} deep water without using a snorkel. During this operation, air for fuel combustion is drawn through the commander's and loader's hatches.<ref name=":12"/>
The Mk1A variant has a new [[auxiliary power unit]] (APU) with double power generation capacity, which allows the tank to operate in silent watch mode while the main engine is off. The use of an APU reduces the IR/thermal and acoustic signature and enhances the tank's [[ambush]] attack capability.<ref name=":24" /> The Arjun&nbsp;Mk1A has an [https://bel-india.in/product/advanced-land-navigation-system-mk-ii/ Advanced Land Navigation System] (ALNS)<ref name=":27" /><ref>{{Cite web |date=2024-07-29 |title=DAC clears capital acquisition proposals to enhance the capabilities of Indian Army & Indian Coast Guard |url=https://pib.gov.in/PressReleasePage.aspx?PRID=2038476 |access-date=2024-10-23 |website=[[Press Information Bureau]]}}</ref> in addition to the [[GPS]]/[[inertial navigation system]] it retains from its predecessor, for enhanced navigation in uncharted hostile enemy territory.<ref name=":15" />


The MK1A variant has a new [[auxiliary power unit]] (APU) with double power generation capacity, which allows the tank to operate in silent watch mode while the main engine is off. The use of an APU reduces the IR/thermal and acoustic signature and enhances the tank's ambush attack capability.<ref name=":24"/> The Arjun&nbsp;MK1A has an Advanced Land Navigation System (ALNS)<ref name=":27"/> in addition to the GPS/inertial navigation system it retains from its predecessor, for enhanced navigation in uncharted hostile enemy territory.<ref name=":15"/>
In the Arjun Mk1A variant, the driver has an uncooled [[night-vision camera]] and an uncooled [[thermal imager]] with binocular vision enabling effortless driving at a reasonable speed on a pitch-black night.<ref name=":15" />


In the Arjun MK1A variant, the driver has an uncooled Night Vision camera and an uncooled thermal imager with binocular vision enabling effortless driving at a reasonable speed on a pitch-black night.<ref name=":15"/>
====DATRAN 1500====
{{Excerpt|BEML|DATRAN 1500|paragraphs=1, 3-4}}


==== Integrated Automotive Vetronics System ====
==== Integrated Automotive Vetronics System ====
Developed by CVRDE, the Integrated Automotive Vetronics System (IAVS) is a health monitoring system developed for tanks and armoured fighting vehicles operated by the Indian Army.<ref name=":19"/> The IAVS is a "system of systems" which integrates sensors and subsystems on board the Arjun to make the tank an efficient fighting machine. The IAVS monitors the data bus that interlaces the hull and turret subsystems, analyses automotive performance and alerts the crew when maintenance is due.<ref name=":19"/>
Developed by [[CVRDE]], the Integrated Automotive [[Vetronics]] System (IAVS) is a health monitoring system developed for tanks and [[armoured fighting vehicles]] operated by the Indian Army.<ref name=":19"/> The IAVS is a "[[system of systems]]" which integrates sensors and subsystems on board the Arjun to make the tank an efficient fighting machine. The IAVS monitors the data bus that interlaces the hull and turret subsystems, analyses automotive performance and alerts the crew when maintenance is due.<ref name=":19"/>


The system also integrates the driver's enhanced sight system and provides automated driving.<ref name=":19"/> The tank crew interacts with the system through an integrated touch screen display.<ref name=":19"/> Its trials were successfully completed in August 2015 during which the prototype covered {{convert|430|km}} under harsh weather conditions.<ref name=":20"/>
The system also integrates the driver's enhanced sight system and provides automated driving.<ref name=":19"/> The tank crew interacts with the system through an integrated touch screen display.<ref name=":19"/> Its trials were successfully completed in August 2015 during which the prototype covered {{convert|430|km}} under harsh weather conditions.<ref name=":20"/>


== Operational history ==
== Operational history ==
Since its induction into service, the Arjun has participated in a number of wargames carried out by the Indian Army. In 2010, the first two armoured regiments equipped with Arjun tanks participated in the Army's annual winter exercise. The same year, the Indian Army carried out a comparative trial pitting the newly inducted Arjun&nbsp;MK1 tanks against the imported T-90 tanks.<ref name=":9"/> The trial was carried out in four phases from 19&nbsp;February 2010 to 12&nbsp;March 2010, checking the subsystem performance, medium fording capability, automotive run and firing trials.<ref name=":9"/> The result of the comparative trial was not published until 2013, when it was reported that the Arjun had outperformed the T-90.<ref name=":17"/>
Since its induction into service, the Arjun has participated in a number of wargames carried out by the Indian Army. In 2010, the first two armoured regiments equipped with Arjun tanks participated in the Army's annual winter exercise. The same year, the Indian Army carried out a comparative trial pitting the newly inducted Arjun&nbsp;MK1 tanks against the imported T-90 tanks.<ref name=":9"/> The trial was carried out in four phases from 19&nbsp;February 2010 to 12&nbsp;March 2010, checking the subsystem performance, medium fording capability, automotive run and firing trials.<ref name=":9"/> In March 2010, it was reported that the Arjun had outperformed the T-90 in terms of both firepower and mobility.<ref name=":17"/>


During the comparative trials, the Arjun reportedly demonstrated its ability to target and engage moving targets while moving in the opposite direction. In addition, it demonstrated a zero water ingress medium fording capability, multiple target discrimination, and effortless automotive performance achieved even in the heavy [[Dune|dunal]] desert terrain.<ref name=":18">{{Cite book|url=https://cag.gov.in/uploads/download_audit_report/2014/Union_Compliance_Defence_Army_Ordnance_Factories_35_2014_annexures.pdf|title=CAG Report No.35 (Defence Services)|publisher=[[Comptroller and Auditor General of India]]|year=2014|page=35|chapter=Annexure-XIX}}</ref>
During the comparative trials, the Arjun reportedly demonstrated its ability to target and engage moving targets while moving in the opposite direction. In addition, it demonstrated a zero water ingress medium fording capability, multiple target discrimination, and effortless automotive performance achieved even in the heavy [[Dune|dunal]] desert terrain.<ref name=":18">{{Cite book|url=https://cag.gov.in/uploads/download_audit_report/2014/Union_Compliance_Defence_Army_Ordnance_Factories_35_2014_annexures.pdf|title=CAG Report No.35 (Defence Services)|publisher=[[Comptroller and Auditor General of India]]|year=2014|page=35|chapter=Annexure-XIX}}</ref>
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*'''Arjun MK1''': First production variant Arjun tank similar to the Leopard&nbsp;2A4, entered service with the Indian Army in 2004.<ref name=":21"/> It is a 58.5 ton main battle tank equipped with Kanchan composite armour, a 120&nbsp;mm rifled gun and an indigenous FCS with digital ballistic computer. It has a laser warning receiver based active protection system.<ref name=":12"/>
*'''Arjun MK1''': First production variant Arjun tank similar to the Leopard&nbsp;2A4, entered service with the Indian Army in 2004.<ref name=":21"/> It is a 58.5 ton main battle tank equipped with Kanchan composite armour, a 120&nbsp;mm rifled gun and an indigenous FCS with digital ballistic computer. It has a laser warning receiver based active protection system.<ref name=":12"/>
*'''[[Bhim SPH]]''': A 155&nbsp;mm self-propelled howitzer variant of the Arjun has been prototyped by fitting the South African [[DENEL Corporation|Denel]] T6 turret, which comes with the [[G5 howitzer]] to the Arjun chassis. This project has been cancelled as Denel has become embroiled in a corruption scandal in India.<ref>{{Cite web|date=2013-11-09|title=India's Self-Propelled Artillery Project Bhim To Get a New Lease of Life – Defence Now|url=http://www.defencenow.com/news/453/indias-self-propelled-artillery-project-bhim-to-get-a-new-lease-of-life.html|access-date=2021-07-15|website=DefenceNow|archive-url=https://web.archive.org/web/20131109170407/http://www.defencenow.com/news/453/indias-self-propelled-artillery-project-bhim-to-get-a-new-lease-of-life.html|archive-date=9 November 2013}}</ref>
*'''[[Bhim SPH]]''': A 155&nbsp;mm self-propelled howitzer variant of the Arjun has been prototyped by fitting the South African [[DENEL Corporation|Denel]] T6 turret, which comes with the [[G5 howitzer]] to the Arjun chassis. This project has been cancelled as Denel has become embroiled in a corruption scandal in India.<ref>{{Cite web|date=2013-11-09|title=India's Self-Propelled Artillery Project Bhim To Get a New Lease of Life – Defence Now|url=http://www.defencenow.com/news/453/indias-self-propelled-artillery-project-bhim-to-get-a-new-lease-of-life.html|access-date=2021-07-15|website=DefenceNow|archive-url=https://web.archive.org/web/20131109170407/http://www.defencenow.com/news/453/indias-self-propelled-artillery-project-bhim-to-get-a-new-lease-of-life.html|archive-date=9 November 2013}}</ref>
*'''Arjun Catapult System''': A 130&nbsp;mm catapult system based on the Arjun chassis. The trials were concluded successfully, and the Indian Army is expected to place an order for 40 systems.<ref>{{cite book|url=https://www.mod.gov.in/sites/default/files/AR1415_0.pdf|title=Annual report 2014-15|publisher=[[Ministry of Defence (India)]]|year=2014|page=82}}</ref>
*'''Arjun Catapult System''': A 130&nbsp;mm [[M-46 Catapult|Catapult]] howitzer system based on the Arjun chassis. The trials were concluded successfully, and the Indian Army is expected to place an order for 40 systems.<ref>{{cite book|url=https://www.mod.gov.in/sites/default/files/AR1415_0.pdf|title=Annual report 2014-15|publisher=[[Ministry of Defence (India)]]|year=2014|page=82}}</ref>
[[File:BLT-ARJUN.jpg|thumb|Bridge Layer Tank (BLT) Arjun]]
*'''Bridge Layer Tank''' (BLT) based on the Arjun chassis developed by the CVRDE. It uses the "scissors type" of bridge laying method, which does not raise the bridge high up into the air, reducing its visibility to hostile forces.<ref>{{Cite web|title=Bridge Layer Tank (BLT) Arjun|url=https://www.drdo.gov.in/bridge-layer-tank-blt-arjun|access-date=2021-07-18|website=Defence Research and Development Organisation (DRDO), Ministry of Defence, Government of India}}</ref>
*'''Bridge Layer Tank''' (BLT) based on the Arjun chassis developed by the CVRDE. It uses the "scissors type" of bridge laying method, which does not raise the bridge high up into the air, reducing its visibility to hostile forces.<ref>{{Cite web|title=Bridge Layer Tank (BLT) Arjun|url=https://www.drdo.gov.in/bridge-layer-tank-blt-arjun|access-date=2021-07-18|website=Defence Research and Development Organisation (DRDO), Ministry of Defence, Government of India}}</ref>
*'''Arjun ARRV''': Armoured recovery and repair vehicle based on the Arjun chassis developed by CVRDE and BEML, for supporting Arjun tank regiments in battlefield.<ref>{{Cite web|title=Armored Recovery and Repair Vehicle (Arjun ARRV)|url=https://www.drdo.gov.in/armored-recovery-and-repair-vehicle-arjun-arrv|access-date=2021-07-14|website=Defence Research and Development Organisation (DRDO), Ministry of Defence, Government of India}}</ref>
*'''Arjun ARRV''': Armoured recovery and repair vehicle based on the Arjun chassis developed by CVRDE and BEML, for supporting Arjun tank regiments in battlefield.<ref>{{Cite web|title=Armored Recovery and Repair Vehicle (Arjun ARRV)|url=https://www.drdo.gov.in/armored-recovery-and-repair-vehicle-arjun-arrv|access-date=2021-07-14|website=Defence Research and Development Organisation (DRDO), Ministry of Defence, Government of India}}</ref>
* '''[[Tank EX]]''': A hybrid experimental tank prototype, coupling a T-72 chassis with an Arjun turret.<ref>{{Cite web|last=Venkatesh|first=Nitin|date=2012-03-04|title=Bharat Rakshak :: Land Forces Site – Tank-EX: DRDO's New Tank|url=http://www.bharat-rakshak.com/LAND-FORCES/Equipment/Others/351-Tank-Ex.html|url-status=live|access-date=2021-07-15|website=Bharat Rakshak|archive-url=https://web.archive.org/web/20120304085514/http://www.bharat-rakshak.com/LAND-FORCES/Equipment/Others/351-Tank-Ex.html|archive-date=4 March 2012}}</ref>
* '''[[Tank EX]]''': A hybrid experimental tank prototype, coupling a T-72 chassis with an Arjun turret.<ref>{{Cite web|last=Venkatesh|first=Nitin|date=2012-03-04|title=Bharat Rakshak :: Land Forces Site – Tank-EX: DRDO's New Tank|url=http://www.bharat-rakshak.com/LAND-FORCES/Equipment/Others/351-Tank-Ex.html|url-status=live|access-date=2021-07-15|website=Bharat Rakshak|archive-url=https://web.archive.org/web/20120304085514/http://www.bharat-rakshak.com/LAND-FORCES/Equipment/Others/351-Tank-Ex.html|archive-date=4 March 2012}}</ref>
[[File:H2021021495939 (cropped).jpg|thumb|Arjun MK1A]]
[[File:H2021021495939 (cropped).jpg|thumb|Arjun Mk1A]]
*'''Arjun MK1A''': The MK1A (previously designated as MK2) is a new variant of Arjun tank designed to enhance firepower, mobility and survivability. It has a completely redesigned turret protected with improved Kanchan armour and ERA. The MK1A has 89 major and minor improvements, of these 73 could be easily incorporated into the MK1 variant. Other major improvements include the addition of NERA for protection, integration of the gun-launched SAMHO ATGM, integration of the gunner's main sight with the automatic target tracking system, integration of the commander's panoramic sight (CPS MK-II) with the laser rangefinder and dual magnification day sight, the addition of an uncooled thermal sight interfaced with the FCS for hunter-killer capability, the addition of an uncooled sight system with binocular vision for the driver, a [[remote controlled weapon station]], a [[Mine plough|track width mine plough]], a containerized ammunition bin with individual shutter (CABIS) for crew safety, an advanced land navigation system, a new auxiliary power unit with double power generation capacity, and a redesigned hydropneumatic suspension system with new advanced running gear system (ARGS) to enhance agility. The Arjun MK1A has considerably more indigenous content than previous variant.<ref>{{Cite web|url=https://theprint.in/defence/army-set-to-place-order-for-118-arjun-mark-1-as-the-most-potent-tank-in-its-inventory/380869/|title=Army set to place order for 118 Arjun Mark 1-As, the most potent tank in its inventory|last=Philip|first=Snehesh Alex|date=1 March 2020|website=ThePrint|language=en-US|access-date=22 March 2020}}</ref><ref name=":0">{{Cite web|last=Chaitanya|first=SV Krishna|date=2019-12-08|title=India's indigenously designed Arjun Mk-1A clears trials, ready to go into production|url=https://www.newindianexpress.com/nation/2019/dec/08/indias-indigenously-designed-arjun-mk-1a-clears-trials-ready-to-go-into-production-2073023.html|url-status=live|archive-url=https://web.archive.org/web/20210224231323/https://www.newindianexpress.com/nation/2019/dec/08/indias-indigenously-designed-arjun-mk-1a-clears-trials-ready-to-go-into-production-2073023.html|archive-date=16 August 2021|access-date=8 December 2019|website=The New Indian Express}}</ref>
*'''Arjun Mk1A''': The Mk1A (previously designated as MK2) is a new variant of Arjun tank designed to enhance firepower, mobility and survivability. It has a completely redesigned turret protected with improved Kanchan armour and ERA. The Mk1A has 89 major and minor improvements, of these 73 could be easily incorporated into the MK1 variant. Other major improvements include the addition of NERA for protection, integration of the gun-launched SAMHO ATGM, integration of the gunner's main sight with the automatic target tracking system, integration of the commander's panoramic sight (CPS MK-II) with the laser rangefinder and dual magnification day sight, the addition of an uncooled thermal sight interfaced with the FCS for hunter-killer capability, the addition of an uncooled sight system with binocular vision for the driver, a [[remote controlled weapon station]], a [[Mine plough|track width mine plough]], a containerized ammunition bin with individual shutter (CABIS) for crew safety, an advanced land navigation system, a new auxiliary power unit with double power generation capacity, and a redesigned hydropneumatic suspension system with new advanced running gear system (ARGS) to enhance agility. The Arjun Mk1A has considerably more indigenous content than previous variant.<ref>{{Cite web|url=https://theprint.in/defence/army-set-to-place-order-for-118-arjun-mark-1-as-the-most-potent-tank-in-its-inventory/380869/|title=Army set to place order for 118 Arjun Mark 1-As, the most potent tank in its inventory|last=Philip|first=Snehesh Alex|date=1 March 2020|website=ThePrint|language=en-US|access-date=22 March 2020}}</ref><ref name=":0">{{Cite web|last=Chaitanya|first=SV Krishna|date=2019-12-08|title=India's indigenously designed Arjun Mk-1A clears trials, ready to go into production|url=https://www.newindianexpress.com/nation/2019/dec/08/indias-indigenously-designed-arjun-mk-1a-clears-trials-ready-to-go-into-production-2073023.html|url-status=live|archive-url=https://web.archive.org/web/20210224231323/https://www.newindianexpress.com/nation/2019/dec/08/indias-indigenously-designed-arjun-mk-1a-clears-trials-ready-to-go-into-production-2073023.html|archive-date=24 February 2021|access-date=8 December 2019|website=The New Indian Express}}</ref>
* Unmanned ground vehicle variant planned for production.<ref>{{cite web |url=https://www.janes.com/defence-news/india-plans-to-develop-combat-ugv-based-on-arjun-tank/ |title=India plans to develop combat UGV based on Arjun tank |website=www.janes.com |access-date=19 April 2022 |archive-url=https://web.archive.org/web/20220416124121/https://www.janes.com/defence-news/india-plans-to-develop-combat-ugv-based-on-arjun-tank/ |archive-date=16 April 2022 |url-status=dead}}</ref>
* Unmanned ground vehicle variant planned for production.<ref>{{cite web |url=https://www.janes.com/defence-news/india-plans-to-develop-combat-ugv-based-on-arjun-tank/ |title=India plans to develop combat UGV based on Arjun tank |website=www.janes.com |access-date=19 April 2022 |archive-url=https://web.archive.org/web/20220416124121/https://www.janes.com/defence-news/india-plans-to-develop-combat-ugv-based-on-arjun-tank/ |archive-date=16 April 2022 |url-status=dead}}</ref>


===FMBT===
===FMBT===
Variably referred to as the Arjun&nbsp;MK2, Next Generation Main Battle Tank (NGMBT) or Future MBT (FMBT), the FMBT is an upcoming main battle tank developed by DRDO for the Indian Army.<ref name=":2"/><ref name=":23"/> The FMBT is designed to be considerably lighter than Arjun variants, planned to be equipped with advanced electro-optical sight systems and possibly a high power laser-based weapon system in addition to the main gun.<ref name=":2"/> The type and calibre of the main gun has not been decided yet but according to the DRDO the FMBT will have a main gun able to fire high velocity projectiles at a longer distance.<ref name=":23"/> The FMBT will also have network-centric warfare abilities.<ref name=":23"/>
{{Excerpt|Future Main Battle Tank}}
 
The FMBT is intended to be a replacement for the Indian Army's fleet of T-72s, and will be a 50 tonne tank powered by an indigenous 1,500&nbsp;hp or 1,800&nbsp;hp engine with an automatic transmission system collectively called the "Bharat Power Pack".<ref name=":23">{{Cite news|last=Shukla|first=Ajai|date=2010-08-10|title=DRDO to develop army's next-generation tank|work=Business Standard India|url=https://www.business-standard.com/article/economy-policy/drdo-to-develop-army-s-next-generation-tank-110081000023_1.html|access-date=2021-07-06}}</ref><ref name=":22">{{Cite news|last=Subramanian|first=T. S.|date=2010-11-04|title=1,500-horsepower FMBT to replace T-72 tanks beyond 2020|language=en-IN|work=The Hindu|url=https://www.thehindu.com/news/national/1500-horsepower-FMBT-to-replace-T-72-tanks-beyond-2020/article15675648.ece|access-date=2021-07-06|issn=0971-751X}}</ref><ref name=":4"/> The planned FMBT will have a modular design to accommodate emerging technologies.<ref name=":22"/>  Early in the concept phase, it was decided to begin development of the FMBT only after the completion of the Arjun&nbsp;MK1A (previously designated as Arjun&nbsp;MK2).<ref name=":22"/>


== Specifications ==
== Specifications ==
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!width="12%"|
!width="12%"|
!width="44%"| Arjun MK1
!width="44%"| Arjun MK1
!width="44%"| Arjun MK1A
!width="44%"| Arjun Mk1A
|-align=center
|-align=center
| Designer
| Designer
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|-align=center
|-align=center
| Engine  
| Engine  
|colspan=2| 1400&nbsp;hp MTU 838 Ka 501 turbo charged diesel engine<ref name=":3">{{citation |url=http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |title=Technology focus |journal=Technology Focus: Bulletin of Defence Research & Development Organisation |volume=19 |number=3 |date=June 2011 |publisher=DRDO |access-date=10 June 2011 |issn=0971-4413 |archive-url=https://web.archive.org/web/20110809042539/http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |archive-date=9 August 2011 |url-status=dead}}</ref>
| 1400&nbsp;hp MTU 838 Ka 501 turbo charged diesel engine<ref name=":3">{{citation |url=http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |title=Technology focus |journal=Technology Focus: Bulletin of Defence Research & Development Organisation |volume=19 |number=3 |date=June 2011 |publisher=DRDO |access-date=10 June 2011 |issn=0971-4413 |archive-url=https://web.archive.org/web/20110809042539/http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |archive-date=9 August 2011 |url-status=dead}}</ref>
| 1500&nbsp;hp [[BEML#DATRAN 1500|DATRAN]] V12 turbocharged diesel engine
|-align=center
|-align=center
|Power/weight
|Power/weight
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|-align=center
|-align=center
|Secondary
|Secondary
|1×12.7&nbsp;mm HCB<ref name=":3">{{citation |url=http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |title=Technology focus |journal=Technology Focus: Bulletin of Defence Research & Development Organisation |volume=19 |number=3 |date=June 2011 |publisher=DRDO |access-date=10 June 2011 |issn=0971-4413 |archive-url=https://web.archive.org/web/20110809042539/http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |archive-date=9 August 2011 |url-status=dead}}</ref>
|1 × 12.7&nbsp;mm HCB<ref name=":3">{{citation |url=http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |title=Technology focus |journal=Technology Focus: Bulletin of Defence Research & Development Organisation |volume=19 |number=3 |date=June 2011 |publisher=DRDO |access-date=10 June 2011 |issn=0971-4413 |archive-url=https://web.archive.org/web/20110809042539/http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |archive-date=9 August 2011 |url-status=dead}}</ref>
1×MAG 7.62&nbsp;mm Tk 715 A
1 × MAG 7.62&nbsp;mm Tk 715 A
|1×12.7&nbsp;mm remotely operated gun turret<ref name="DRDO1">[http://www.drdo.org/mbt.html Main Battle Tank, Arjun] {{Webarchive|url=https://web.archive.org/web/20080928094309/http://www.drdo.org/mbt.html |date=28 September 2008}}, Defence Research & Development Organisation (DRDO), Ministry of Defence, India</ref>
|1 × 12.7&nbsp;mm remotely operated gun turret<ref>{{Cite web |date=2017-02-15 |title=BEL launches new weapon control system for Arjun battle tank |url=https://www.financialexpress.com/business/industry-bel-launches-new-weapon-control-system-for-arjun-battle-tank-551619/ |access-date=2024-07-10 |website=Financialexpress |language=en}}</ref>
1×MAG 7.62&nbsp;mm Tk 715 A
1 × MAG 7.62&nbsp;mm Tk 715 A
|-align=center
|-align=center
!colspan=3| Protection
!colspan=3| Protection
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|-align=center
|-align=center
|Passive
|Passive
|colspan=2|Multi-spectral mobile camouflage, anti-infrared/anti-thermal paint.<ref name=":152">{{Cite web|title=Indigenously designed, Tanker Arjun reports for duty|url=https://www.newindianexpress.com/states/tamil-nadu/2019/dec/09/indigenously-designed-tanker-arjun-reports-for-duty-2073063.html|access-date=2021-07-02|website=The New Indian Express}}</ref><ref name=":8"/>
|colspan=2|Multi-spectral mobile camouflage, anti-infrared/anti-thermal paint.<ref name=":152">{{Cite web|title=Indigenously designed, Tanker Arjun reports for duty|url=https://www.newindianexpress.com/states/tamil-nadu/2019/dec/09/indigenously-designed-tanker-arjun-reports-for-duty-2073063.html|access-date=2021-07-02|website=The New Indian Express|date=8 December 2019 }}</ref><ref name=":8"/>
|-align=center
|-align=center
|Active
|Active
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|-align=center
|-align=center
|
|
|12 × Smoke grenades<ref name=":3">{{citation |url=http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |title=Technology focus |journal=Technology Focus: Bulletin of Defence Research & Development Organisation |volume=19 |number=3 |date=June 2011 |publisher=DRDO |access-date=10 June 2011 |issn=0971-4413 |archive-url=https://web.archive.org/web/20110809042539/http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |archive-date=9 August 2011 |url-status=dead}}</ref>
|12 × 81&nbsp;mm Anti-thermal Anti-laser Smoke Grenade<ref name=":3">{{citation |url=http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |title=Technology focus |journal=Technology Focus: Bulletin of Defence Research & Development Organisation |volume=19 |number=3 |date=June 2011 |publisher=DRDO |access-date=10 June 2011 |issn=0971-4413 |archive-url=https://web.archive.org/web/20110809042539/http://drdo.gov.in/drdo/pub/techfocus/2011/tf_june2011.pdf |archive-date=9 August 2011 |url-status=dead}}</ref>
|16 × Smoke grenades<ref name=":1"/>
|16 × 81&nbsp;mm Anti-thermal Anti-laser Smoke Grenade<ref name=":1"/>
|-align=center
|-align=center
|}
|}
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**[[Indian Army]]
**[[Indian Army]]
***124 Arjun MK1 tanks in service.<ref>{{Cite web|title=118 Arjun Main Battle Tanks, MK-1A, with 71 upgrades will be made for Rs 8,500 crore – Huge orderbook for MBT MK-1A|url=https://economictimes.indiatimes.com/news/defence/118-arjun-main-battle-tanks-mk-1a-with-71-upgrades-will-be-made-for-rs-8500-crore/huge-orderbook-for-mbt-mk-1a/slideshow/80970921.cms|access-date=2 July 2021|website=The Economic Times}}</ref>
***124 Arjun MK1 tanks in service.<ref>{{Cite web|title=118 Arjun Main Battle Tanks, MK-1A, with 71 upgrades will be made for Rs 8,500 crore – Huge orderbook for MBT MK-1A|url=https://economictimes.indiatimes.com/news/defence/118-arjun-main-battle-tanks-mk-1a-with-71-upgrades-will-be-made-for-rs-8500-crore/huge-orderbook-for-mbt-mk-1a/slideshow/80970921.cms|access-date=2 July 2021|website=The Economic Times}}</ref>
***2 MK1A (prototypes) in service, with 118 MK1A tanks on order.<ref>{{cite web|url=https://pib.gov.in/PressReleasePage.aspx?PRID=1757320|title=MoD places supply order for 118 Main Battle Tanks Arjun Mk-1A for Indian Army|date=23 September 2021|publisher=Press Information Bureau}}</ref><ref name=":13"/><ref>{{Cite web|author=Staff Writer|date=13 February 2021 |title=PM Modi will hand over Arjun Mark 1A to Indian Army|url=https://www.livemint.com/news/india/pm-narendra-modi-will-hand-over-arjun-mark-1a-to-indian-army-know-its-features-11613217391683.html|access-date=14 February 2021|website=mint|language=en}}</ref> On 23 September 2021, the Indian Army signed a contract for 118 Arjun Mk.1As with the first five due to be delivered within 30 months.<ref>{{cite web |url=https://www.armyrecognition.com/defense_news_september_2021_global_security_army_industry/indian_mod_orders_118_indigenous_arjun_mk-1a_main_battle_tanks.html |title=Indian MoD orders 118 indigenous Arjun Mk-1A Main Battle Tanks |website=Army Recognition |date=24 September 2021 |access-date=8 October 2021}}</ref>
***2 Mk1A (prototypes) in service, with 118 Mk1A tanks on order.<ref>{{cite web|url=https://pib.gov.in/PressReleasePage.aspx?PRID=1757320|title=MoD places supply order for 118 Main Battle Tanks Arjun Mk-1A for Indian Army|date=23 September 2021|publisher=Press Information Bureau}}</ref><ref name=":13"/><ref>{{Cite web|author=Staff Writer|date=13 February 2021 |title=PM Modi will hand over Arjun Mark 1A to Indian Army|url=https://www.livemint.com/news/india/pm-narendra-modi-will-hand-over-arjun-mark-1a-to-indian-army-know-its-features-11613217391683.html|access-date=14 February 2021|website=mint|language=en}}</ref> On 23 September 2021, the Indian Army signed a contract for 118 Arjun Mk.1As with the first five due to be delivered within 30 months.<ref>{{Cite web |date=2020-03-18 |title=Indian MoD concludes price negotiations for 118 Arjun Mk 1A MBTs |url=https://www.janes.com/osint-insights/defence-news/indian-mod-concludes-price-negotiations-for-118-arjun-mk-1a-mbts |access-date=2025-12-16 |website=Janes |language=en}}</ref><ref>{{cite web |url=https://www.armyrecognition.com/defense_news_september_2021_global_security_army_industry/indian_mod_orders_118_indigenous_arjun_mk-1a_main_battle_tanks.html |title=Indian MoD orders 118 indigenous Arjun Mk-1A Main Battle Tanks |website=Army Recognition |date=24 September 2021 |access-date=8 October 2021}}</ref>
***40 130&nbsp;mm M-46 Catapults based on Arjun chassis.<ref>{{Cite web|date=29 August 2014|title=Breaking News: 40 Arjun Catapult systems for Indian Army|url=http://www.spslandforces.com/exclusive/?id=17&h=BREAKING-NEWS:-40-Arjun-Catapult-systems-for-Indian-Army#:~:text=The%20Indian%20Army%20has%20been,on%20targets%20upto%201.4%20km.|url-status=live|access-date=16 July 2021|website=www.spslandforces.com}}</ref>
***40 130&nbsp;mm M-46 Catapults based on Arjun chassis.<ref>{{Cite web|date=29 August 2014|title=Breaking News: 40 Arjun Catapult systems for Indian Army|url=http://www.spslandforces.com/exclusive/?id=17&h=BREAKING-NEWS:-40-Arjun-Catapult-systems-for-Indian-Army#:~:text=The%20Indian%20Army%20has%20been,on%20targets%20upto%201.4%20km.|access-date=16 July 2021|website=www.spslandforces.com}}</ref>


===Potential Operators===
===Failed contracts===
* {{flag|Bahrain}}: Bahrain is in talks with India for the procurement of Arjun Mk II.<ref>{{Cite web|title=Bahrain has launched talks with India to procure Arjun Mk II main battle tanks|url=https://www.armyrecognition.com/defense_news_march_2022_global_security_army_industry/bahrain_has_launched_talks_with_india_to_procure_arjun_mk_ii_main_battle_tanks.html|access-date=16 March 2022|publisher=Army Recognition}}</ref>
* {{flag|Bahrain}}: Bahrain was in talks with India for the procurement of Arjun Mk II, which was reported in March 2022.<ref>{{Cite web|title=Bahrain has launched talks with India to procure Arjun Mk II main battle tanks|url=https://www.armyrecognition.com/defense_news_march_2022_global_security_army_industry/bahrain_has_launched_talks_with_india_to_procure_arjun_mk_ii_main_battle_tanks.html|access-date=16 March 2022|publisher=Army Recognition}}</ref>
* {{flag|Colombia}}: Colombia expressed interest to purchase the Arjun in 2009.<ref>{{cite web |url=https://www.hindustantimes.com/india/a-first-foreign-interest-in-arjun-tank/story-stz3ErilImE0UUvTLpl2hM.html |title=A first: Foreign interest in Arjun tank |date=29 June 2009}}</ref> As of 2022, there's no signed contract available.
* {{flag|Colombia}}: Colombia expressed interest to purchase the Arjun in 2009.<ref>{{cite web |url=https://www.hindustantimes.com/india/a-first-foreign-interest-in-arjun-tank/story-stz3ErilImE0UUvTLpl2hM.html |title=A first: Foreign interest in Arjun tank |date=29 June 2009}}</ref>


==See also==
==See also==
 
*[[List of main battle tanks by generation]]
*[[Tank EX]]


== Notes ==
== Notes ==
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[[Category:Main battle tanks of India]]
[[Category:Main battle tanks of India]]
[[Category:Main battle tanks of the Cold War]]
[[Category:Main battle tanks of the Cold War]]
[[Category:Post–Cold War main battle tanks]]
[[Category:Main battle tanks of the post–Cold War period]]
[[Category:Defence Research and Development Organisation]]
[[Category:Defence Research and Development Organisation]]
[[Category:Military vehicles introduced in the 2000s]]
[[Category:Military vehicles introduced in the 2000s]]
[[Category:Tanks named after individuals]]
[[Category:AVANI vehicles]]

Latest revision as of 17:17, 20 February 2026


Arjun
New Arjun MK1A variant during field trials.
TypeMain battle tank
Place of originIndia
Production history
DesignerCombat Vehicles Research and Development Establishment
Designed1983–1996
ManufacturerArmoured Vehicles Nigam Limited (at Heavy Vehicles Factory)
Produced2004–present
No. built141 (as of 2021)[N 1]
VariantsSee Variants
Specifications
MassMK1: 58.5 tonnes (57.6 long tons; 64.5 short tons)
MK1A: 68 tonnes (67 long tons; 75 short tons)[3]
LengthMK1: 10.19 metres (33 ft 5 in)
MK1A: 10.64 metres (34 ft 11 in)
WidthMK1: 3.85 metres (12 ft 8 in)
MK1A: 3.95 metres (13 ft 0 in)
HeightMK1: 2.32 metres (7 ft 7 in)
MK1A: ~2.8 metres (9 ft 2 in)
Crew4 (commander, gunner, loader and driver)

ArmourERA–NERA, Kanchan armour
Main
armament
1× 120 mm rifled tank gun able to fire LAHAT, SAMHO,[4] HEAT, APFSDS, HESH, PCB, Thermobaric rounds[5]
(Rate of fire: 6–8 rounds/minute, total: 42 containerized rounds)[6][7]
Secondary
armament
1 × NSV 12.7mm AA MG on BEL RCWS
1 × MAG 7.62 mm Tk715 coaxial MG
12 × 81mm AT-AL smoke grenades. (MK1) 16 × 81mm AT-AL smoke grenades. (MK1A)[8]
EngineMK1: MTU MB 838 Ka-501 V10; 1,400 hp (1,030 kW) liquid-cooled turbocharged diesel engine[9]
MK1A: DATRAN; 1,500 hp (1,118 kW) V12 engine[10][11]
Power/weightMK1: 24 hp/ton[12]
TransmissionRenk epicyclic train gearbox, 4 forward + 2 reverse gears.
CVRDE automatic transmission in development
SuspensionHydropneumatic
Ground clearance0.45 metres (1 ft 6 in)
Fuel capacity1,610 litres (350 imp gal; 430 US gal)
Operational
range
MK1: 450 kilometres (280 mi)[13]
Maximum speed MK1: ~70 km/h (43 mph)
40 km/h (25 mph) cross country[14]

The Arjun (sa) is a third generation main battle tank developed by the Combat Vehicles Research and Development Establishment (CVRDE) of the Defence Research and Development Organisation (DRDO), for the Indian Army.[15][16] The tank is named after Arjuna, the archer prince who is the main protagonist of the Indian epic poem Mahabharata. Design work began in 1986 and was finished in 1996. The Arjun main battle tank entered service with the Indian Army in 2004.[17] The 43rd Armoured Regiment, formed in 2009, was the first regiment to receive the Arjun.[17][18]

The Arjun features a 120 mm rifled main gun with indigenously developed armour-piercing fin-stabilized discarding-sabot ammunition, one PKT 7.62 mm coaxial machine gun and a NSVT 12.7 mm machine gun. Powered by a single MTU multi-fuel diesel engine rated at 1,400 hp, it can achieve a maximum speed of 70 km/h (43 mph) and a cross-country speed of 40 km/h (25 mph).[19] It has a four-man crew: commander, gunner, loader and driver.

In 2010 and 2013, the Indian Army carried out comparative trials in the Thar Desert of Rajasthan, pitting the newly inducted Arjun MK1 against the Indian Army's frontline Russian-designed T-90 tanks, during which the Arjun reportedly exhibited better accuracy and mobility.[20][21]

The fire-control system (FCS) originally developed for the Arjun main battle tank has been integrated into the T-90 tanks built in India under a transfer of technology (ToT) agreement by the Heavy Vehicles Factory (HVF) at Avadi.[22]

History[edit | edit source]

After the 1971 Bangladesh Liberation War, the Government of India decided to develop a new main battle tank.[23] The Indian Army issued a general staff qualitative requirement (GSQR) for a new battle tank, called for a 50 tonne main battle tank equipped with a 120 mm rifled gun, computerised FCS and powered by a 1,400 hp diesel engine.[24][25] The programme to develop an indigenous tank was authorised in 1974 and funds were released for its development. In 1976, the Combat Vehicles Research and Development Establishment (CVRDE) was established under the Defence Research and Development Organisation (DRDO) to undertake the development of the Arjun main battle tank and to carry out research and development (R&D) on future combat vehicles for the Indian Army.[26]

In 1983, the project began following a consultancy agreement with Krauss-Maffei, who had previously developed the Leopard 2, to oversee design, development and evaluation, while Indian state owned Bharat Electronics Limited (BEL) and HVF were joined with the CVRDE in the development of the Arjun.[1] The original plan envisaged the development and rollout of the first tank prototype by 1980, which was later revised to 1987. The first prototype was delivered in 1989. The prototype tank resembled the Leo2A4 main battle tank of Germany.[24]

From 1993 to 1996, the Indian Army carried out an extensive series of trials, which revealed some major defects in the tank, including the engine overheating and suboptimal performance of the weapons system.[N 2] By the end of 1996, 14 pre-production series (PPS) tanks (PPS-1 to PPS-14) were built and delivered to the Indian Army to conduct trials. Based on these trials, the Army identified 10 shortcomings that needed to be addressed before inaugurating the tank into the service.[1] During this period, the cost of the Arjun programme increased significantly from the 1974 estimate of 15.50 crore (equivalent to 374 crore or US$52.4 million in 2019) to a developmental cost of 307.48 crore (equivalent to 15 billion or US$206.7 million in 2019) in 1995.[27][28]

The initial delays and cost escalations were attributed to the sequential revisions done to the original General Staff Qualitative Requirement (GSQR) issued in 1974 to accommodate new features.[1] In 1996, the development of the PPS-15 tank prototype was initiated to address the shortcomings listed by the Army. In 1997, a 'joint action plan' was formulated to address the identified flaws and to make the tank ready for induction.[1] By 1999, both the Army and Cabinet Committee on Security (CCS) gave clearance for a limited production run of the Arjun main battle tank based on the PPS-15 prototype. In 2000, the Indian Army placed an order for the procurement of 124 Arjun MK1 tanks.[N 3][1]

Production and deployment[edit | edit source]

An early Arjun production model

One Arjun tank (PPS-15) operated by the 43rd Armoured Regiment made a public appearance in the 1997 and 2001 Republic Day Parades.[24][29] The serial production of the Arjun main battle tank began in 2003 at HVF Avadi. The first tank equipped with the BEL developed Integrated Fire Control System (IFCS), ballistic computer and gunner's main sight, was rolled out in 2004 and delivered in the first batch of five Arjun tanks on 7 August 2004.[30][31] The first tranche of production version Arjun tanks was delivered to the 43rd Armoured Regiment in 2004. By 2009, two armoured regiments had been equipped with the vehicle. The two regiments with Arjun MBT were 43rd and 75th Armoured Regiment.[17][32] The first test firing of the LAHAT-launched (Laser Homing Attack or Laser Homing Anti-Tank gun) anti-tank guided missile was carried out in 2004.[31]

By 2006, unit maintenance and unit repair vehicles developed for the Arjun-equipped regiments had been cleared for induction.[33] In 2008, a multi-purpose mobile camouflage system (MCS), developed as part of the Defensive Aid System (DAS) project, had been completed successfully. Field evaluation trials were conducted on the Arjun MK1 main battle tank in 2009.[34][35] In 2009, an advanced laser warning countermeasure system (ALWCS) and a fibre-optic gyro-based sensor package unit was developed and integrated on the Arjun MK1 main battle tank after field trials were carried out in two phases from May to August 2009.[35] The first batch of the Armament Research & Development Establishment (ARDE) developed recoil system for the Arjun was delivered to the HVF Avadi after successful completion of field trials in 2009; the total order was for 124 systems.[35]

In 2010, combat simulators (turret and driver simulators) developed for the Arjun had been inducted into the Army, its development was authorised in 2009.[36][35] By June 2011, more than 100 tanks had been delivered to the Indian Army.[14] The delivery of all 124 tanks was completed by mid-2012.[37] From 2013 to 2015, 75% of the Arjun tanks had to be grounded because of a lack of spare parts. By 2016, this problem had been rectified, and the tanks returned to active service.[1]

Upgrades[edit | edit source]

In 2010, the DRDO proposed an improved variant of the Arjun designated as the Arjun MK2 as a next step in the programme.[38] The configuration of the new variant was finalised in mid-2010 after consultations with the army. The new tank was redesigned to have 89 major and minor improvements intended to enhance the firepower and survivability of the tank. Of these, 73 improvements could be fitted easily on the existing MK1 variant tanks. In the same year, the Indian Army placed an order for the procurement of 124 Arjun MK2 tanks, which was later approved by the Defence Acquisition Council (DAC).[38] In 2011, the first MK2 prototype was built. This incorporated some 20 improvements, including a new commander's independent panoramic sight system. The tank was handed over to the army to carry out validation trial phase one.[38][37] By 2012, the first complete prototype incorporating all the listed improvements was rolled out for system validation trial phase two.[39]

As part of the developmental trials, the first phase of the LAHAT gun-launched anti-tank guided missile firing trials were carried out by 2013.[40][41] In 2015, DRDO developed an Integrated Automotive Vetronics System (IAVS) that was integrated into the Arjun MK2 prototype tank. Field trials were carried out over 430 kilometres (270 mi) under harsh environmental conditions.[42][43] In 2014 and 2016, two new rounds, Penetration-Cum-Blast and Thermobaric, were developed for the Arjun tank and successfully tested. Impact assessments were also carried out with instruments to measure shock and blast pressure.[44]

In the meantime, the Arjun MK2 variant was redesignated as the Arjun Mk1A. By 2018, two Arjun Mk1A prototypes had been built and completed user trials by the end of the year.[2] In May 2023, it's reported that the Mk1A will have 72 new features.[45]

In February 2024, DRDO reported that deliveries of the Mk1A are facing delays because of shortages of tank engines.[46]

In June 2025, BEML entered into an agreement with DRDO's VRDE to manufacture Unit Repair Vehicle (URV), Unit Maintenance Vehicle (UMV) and Full Trailer for 70T Tank Transporter equipped with an Advanced Hydraulic Suspension System for Arjun MBT.[47][48][49]

Design[edit | edit source]

Arjun MK1

Armament[edit | edit source]

Primary[edit | edit source]

The Arjun main battle tank has a 120 mm rifled gun fitted with an ARDE-developed (Armament Research and Development Establishment) recoil system, muzzle reference system and fume extractor, which can fire a variety of guided or unguided anti-armour munitions.[50] The main gun is made from high strength electro-slag remelting (ESR) steel which is insulated with a thermal sleeve and autofrettaged to withstand higher pressure.[14][23] The newer Arjun Mk1A variant retains the 120 mm rifled gun with improved barrel,[23] although India has developed a 125 mm smoothbore gun for the T-90 tank, which is under license for production.[22][51][52]

Arjun Tank ammunition, from left to right: APFSDS—designated locally as FSAPDS, HESH, TB, and PCB rounds

The Arjun MK1 can fire several types of munitions, including indigenously developed armour-piercing fin-stabilized discarding sabot (APFSDS) and dual purpose high-explosive squash head (HESH) rounds. The Arjun MK1 can carry a mix of 42 APFSDS and HESH rounds in blast-proof canisters with blow out panels.[53][14] In 2017, the Mark 2 variant of the APFSDS with a long rod tungsten alloy penetrator was developed and successfully tested by ARDE for the new Alpha variant of the Arjun (Mk1A).[54] The new APFSDS Mark 2 round reportedly has improved penetration compared to the extant Mark 1 round.[55][54] In addition to the existing rounds, the ARDE also developed and successfully tested two high explosive 120 mm rounds for the Arjun: Penetration Cum Blast (PCB) and Thermobaric (TB) Ammunition for urban warfare, which can be fired from existing MK1 and newer Mk1A tanks.[56][57]

SAMHO[edit | edit source]

To enhance the firepower of the Arjun, DRDO earlier considered equipping the tank with a LAHAT gun-launched anti-tank guided missile, but in 2014, it was announced the plan had been dropped. In the same year, DRDO announced the development of an Indian-made, gun-launched guided missile under Cannon Launched Guided Missile Programme (CLMDP), the SAMHO.[41] In 2020, DRDO successfully test fired SAMHO from an Arjun main battle tank.[58]

ARDE developed the SAMHO missile in association with the High Energy Materials Research Laboratory (HEMRL) and the Instruments Research and Development Establishment (IRDE).[59] The SAMHO guided missile has two high-explosive anti-tank (HEAT) tandem-charge warheads designed to defeat explosive reactive armour (ERA) protection.[58] The SAMHO is a dual purpose guided missile which can engage and neutralise armoured fighting vehicles, tanks, and low flying targets such as attack helicopters at a minimum range of 1.5 kilometres (0.93 mi) and maximum range of up to 5 kilometres (3.1 mi).[59][60]

Secondary[edit | edit source]

Remote controlled weapon station on Arjun Mk1A

In addition to the main gun, the Arjun has two machine guns:

  1. A 12.7 mm NSV heavy machine gun mounted in front of the gunner's hatch for engaging armoured vehicles, low flying aircraft and attack helicopters. In the Arjun MK1 it is operated manually while in Mk1A it has been replaced with a remotely operated gun turret which can be operated from inside the tank without exposing personnel to the hostile battlefield.[61] The MKII variant has a RCWS made by Bharat Electronics Ltd (BEL).[62]
  2. A 7.62 mm machine gun in a coaxial weapon mount.[19]

Fire control and sights[edit | edit source]

The Arjun tanks are equipped with an indigenous fire control system developed by BEL, the Integrated Fire Control System (IFCS).[31] The IFCS consists of a digital ballistic computer which cues information from microprocessor-based sensors for wind-speed, tilt angle, target range, vehicle speed etc., to provide an accurate firing solution.[19] The Arjun's IFCS is designed for quick target acquisition with "first round-first hit probability" during day and night and in all weather conditions. The Arjun has a gun control system integrated into its 120 mm rifled gun which electro-hydraulically stabilises the gun to retain aim accuracy irrespective of the terrain disturbances (while moving).[19] The two axis-stabilised gun control system interfaced with the IFCS offers high accuracy and slewing speed for engaging moving targets while on the move.[19] The fire control system originally developed for the Arjun tank has been integrated into the Indian Army's T-90 tanks.[22]

The Arjun gunner's main sight has an integrated laser range finder, day sight and thermal sight for day and night target recognition and engagement, and dual magnification and fibre-optic gyro based two-axis stabilisation.[19] The sight is integrated with an automatic target tracking system developed by DRDO.[63][23]

The commander's panoramic sight operates independently of the turret. It is stabilised with a fibre-optic gyro, and has an integrated laser rangefinder, day sight with dual magnification and a thermal imaging camera for day and night all-weather 360-degree surveillance.[37] The sight is also interfaced with the ballistic computer, which enables the commander to override the gunner to select and engage targets independently.[37][64] In addition to the laser rangefinder, the Arjun Mk1A variant has an integrated laser target designator linked to the SAMHO gun-launched guided missile.[65]

Protection[edit | edit source]

Armour[edit | edit source]

Close up view of ERA protection on hull glacis and turret of Arjun MK-1A tank

The Arjun MK1 tanks are protected by an indigenously developed armour called Kanchan armour, named after the city of Kanchanbagh, where the Defence Metallurgical Research Laboratory (DMRL) which designed and developed the armour is located.[66] Kanchan is a composite armour that consists of ceramic tiles and composite panels sandwiched between rolled homogeneous armour (RHA) plates. Its exact composition, the material used and the manufacturing processes are kept highly secret.[66] The armour was fielded on the Arjun after extensive evaluation trials carried out against a variety of modern anti-tank munitions, including APFSDS.[67][66]

The Arjun tanks are also protected with ultra-high strength low alloy DMR-1700 steel armour plates developed by the DMRL, which offer enhanced protection against kinetic energy penetrator projectiles such as APFSDS (125 mm) rounds, over the existing RHA plates by a margin of 20 per cent and 25 per cent against 7.62 mm and 12.7 mm armour-piercing projectiles.[68][69]

The latest variant Arjun, the Mk1A, has a completely redesigned turret protected with improved Kanchan armour with enhanced protection against large calibre kinetic energy projectiles,[40] explosive reactive armour (ERA) panels (ERA MK-II) on the turret, hull glacis and the side skirt. The Mk1A also has non-explosive reactive armour (NERA) protection.[64][70] The turret is redesigned to reduce its silhouette, thereby delaying detection at ranges using modern electro-optical sights.[71]

The tank has NBC protection and an automatic fire detection and suppression system for enhanced crew protection and survival.[70]

Defensive aid system[edit | edit source]

Passive protection is provided by a multi-purpose mobile camouflage system (MCS) developed by DRDO; it is integrated on Arjun tanks and evaluations were carried out in 2009.[35] The Arjun also has anti-infrared/anti-thermal paints to reduce its IR signature.[63]

One of the four all-bearing laser warning receivers combined with IR jammer (top) and 360 degree independently rotating smoke grenade launcher (bottom). Both are part of the ALWCS, and operate autonomously

Active protection is provided by the Advanced Laser Warning Countermeasure System (ALWCS), and consists of four laser warning receivers mounted on the top of the turret to provide 360-degree protection cover. The ALWCS alerts the crew and indicates the direction of a threat when a laser rangefinder/designator, IR illuminator is pointed at the tank.[72] The ALWCS has integrated IR jammers and aerosol based smoke grenades to confuse the anti-tank guided munitions.

The ALWCS is interfaced with the FCS of the Arjun tank, which autonomously rotates the grenade launcher in the direction of and perceived threat and fires aerosol smoke grenades.[73][35] It has auto and manual modes of operation.[73]

Crew safety and protection[edit | edit source]

The Arjun has a crew of four—commander, gunner, loader and driver. The Arjun's crew compartment is ergonomically designed for crew safety and comfort and is protected with armour and ERA.[63] In Arjun Mk1A, the driver's safety and comfort is enhanced with roof mounted seat to protect him from Shock waves.[23][64] The Arjun's crew and engine compartments are equipped with an automatic fire detection and suppression system, which detects and suppresses fire within 200 milliseconds,[50][54] while ammunition rounds are stored in a containerised ammunition bin with an individual shutter with blow off panels to mitigate the hazard caused by ammunition cook off.[63][23] The Arjun Mk1A variant tank has a track-width mine plough to reduce the risk of anti-tank mines;[23] the tank also has NBC protection.[63]

Mobility[edit | edit source]

The Arjun is a heavy main battle tank that moves on seven roadwheels on each side, supported by an indigenously developed hydropneumatic suspension system. Powered by an MTU 838 Ka 501 turbo charged 10 cylinder liquid cooled diesel engine with a rated power output of 1400 hp at 2400 rpm, the tank has a 70-kilometre (43 mi) top speed and a 40-kilometre-per-hour (25 mph) cross country speed.[74] The Arjun tank has a maximum fuel capacity of 1,610 litres (350 imp gal; 430 US gal)[24] and a range of 450 kilometres (280 mi).[13]

The Arjun has a ground of clearance 0.45 metres (18 in),[24][50] and can ford through 2.15-metre (7 ft 1 in) deep water without using a snorkel. During this operation, air for fuel combustion is drawn through the commander's and loader's hatches.[19]

The latest Arjun Mk1A variant retains the 1,400 hp diesel powerplant but with a redesigned hydropneumatic suspension system and new advanced running gear system for optimal performance and efficiency.[63][23] Earlier Arjun tanks were equipped with tracks supplied by the German company, Diehl, but these were later replaced with tracks supplied by Larsen & Toubro.[71]

The Mk1A variant has a new auxiliary power unit (APU) with double power generation capacity, which allows the tank to operate in silent watch mode while the main engine is off. The use of an APU reduces the IR/thermal and acoustic signature and enhances the tank's ambush attack capability.[71] The Arjun Mk1A has an Advanced Land Navigation System (ALNS)[23][75] in addition to the GPS/inertial navigation system it retains from its predecessor, for enhanced navigation in uncharted hostile enemy territory.[63]

In the Arjun Mk1A variant, the driver has an uncooled night-vision camera and an uncooled thermal imager with binocular vision enabling effortless driving at a reasonable speed on a pitch-black night.[63]

DATRAN 1500[edit | edit source]

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Integrated Automotive Vetronics System[edit | edit source]

Developed by CVRDE, the Integrated Automotive Vetronics System (IAVS) is a health monitoring system developed for tanks and armoured fighting vehicles operated by the Indian Army.[43] The IAVS is a "system of systems" which integrates sensors and subsystems on board the Arjun to make the tank an efficient fighting machine. The IAVS monitors the data bus that interlaces the hull and turret subsystems, analyses automotive performance and alerts the crew when maintenance is due.[43]

The system also integrates the driver's enhanced sight system and provides automated driving.[43] The tank crew interacts with the system through an integrated touch screen display.[43] Its trials were successfully completed in August 2015 during which the prototype covered 430 kilometres (270 mi) under harsh weather conditions.[42]

Operational history[edit | edit source]

Since its induction into service, the Arjun has participated in a number of wargames carried out by the Indian Army. In 2010, the first two armoured regiments equipped with Arjun tanks participated in the Army's annual winter exercise. The same year, the Indian Army carried out a comparative trial pitting the newly inducted Arjun MK1 tanks against the imported T-90 tanks.[38] The trial was carried out in four phases from 19 February 2010 to 12 March 2010, checking the subsystem performance, medium fording capability, automotive run and firing trials.[38] In March 2010, it was reported that the Arjun had outperformed the T-90 in terms of both firepower and mobility.[21]

During the comparative trials, the Arjun reportedly demonstrated its ability to target and engage moving targets while moving in the opposite direction. In addition, it demonstrated a zero water ingress medium fording capability, multiple target discrimination, and effortless automotive performance achieved even in the heavy dunal desert terrain.[76]

In 2013, the Indian Army announced it would not purchase any additional vehicles above the 124 Arjuns that had already been ordered.[21] In 2014, a report from the Comptroller and Auditor General of India noted that some parameters of the 2010 comparative trials had been relaxed for the T-90 tanks.[76]

Variants[edit | edit source]

Arjun ARRV
  • Arjun MK1: First production variant Arjun tank similar to the Leopard 2A4, entered service with the Indian Army in 2004.[50] It is a 58.5 ton main battle tank equipped with Kanchan composite armour, a 120 mm rifled gun and an indigenous FCS with digital ballistic computer. It has a laser warning receiver based active protection system.[19]
  • Bhim SPH: A 155 mm self-propelled howitzer variant of the Arjun has been prototyped by fitting the South African Denel T6 turret, which comes with the G5 howitzer to the Arjun chassis. This project has been cancelled as Denel has become embroiled in a corruption scandal in India.[77]
  • Arjun Catapult System: A 130 mm Catapult howitzer system based on the Arjun chassis. The trials were concluded successfully, and the Indian Army is expected to place an order for 40 systems.[78]
Bridge Layer Tank (BLT) Arjun
  • Bridge Layer Tank (BLT) based on the Arjun chassis developed by the CVRDE. It uses the "scissors type" of bridge laying method, which does not raise the bridge high up into the air, reducing its visibility to hostile forces.[79]
  • Arjun ARRV: Armoured recovery and repair vehicle based on the Arjun chassis developed by CVRDE and BEML, for supporting Arjun tank regiments in battlefield.[80]
  • Tank EX: A hybrid experimental tank prototype, coupling a T-72 chassis with an Arjun turret.[81]
Arjun Mk1A
  • Arjun Mk1A: The Mk1A (previously designated as MK2) is a new variant of Arjun tank designed to enhance firepower, mobility and survivability. It has a completely redesigned turret protected with improved Kanchan armour and ERA. The Mk1A has 89 major and minor improvements, of these 73 could be easily incorporated into the MK1 variant. Other major improvements include the addition of NERA for protection, integration of the gun-launched SAMHO ATGM, integration of the gunner's main sight with the automatic target tracking system, integration of the commander's panoramic sight (CPS MK-II) with the laser rangefinder and dual magnification day sight, the addition of an uncooled thermal sight interfaced with the FCS for hunter-killer capability, the addition of an uncooled sight system with binocular vision for the driver, a remote controlled weapon station, a track width mine plough, a containerized ammunition bin with individual shutter (CABIS) for crew safety, an advanced land navigation system, a new auxiliary power unit with double power generation capacity, and a redesigned hydropneumatic suspension system with new advanced running gear system (ARGS) to enhance agility. The Arjun Mk1A has considerably more indigenous content than previous variant.[82][64]
  • Unmanned ground vehicle variant planned for production.[83]

FMBT[edit | edit source]

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Specifications[edit | edit source]

Arjun specifications
Arjun MK1 Arjun Mk1A
Designer Combat Vehicles Research and Development Establishment (CVRDE)[14]
Manufacturer Heavy Vehicles Factory (HVF)
Produced 2004–2012 2021 –
Operator Indian Army
Technical details
Length 10.6 m (35 ft) (with gun forward)[14]
Width 3.9 m (13 ft)[14]
Height 2.32 m (7 ft 7 in) (turret roof) 3.03 m (9.9 ft) (with gun mount)[14]
Weight 58.5 t (57.6 long tons; 64.5 short tons)[14] 68 t (67 long tons; 75 short tons)[64]
Engine 1400 hp MTU 838 Ka 501 turbo charged diesel engine[14] 1500 hp DATRAN V12 turbocharged diesel engine
Power/weight 24:1 hp/ton[14]
Range 450 km (280 mi)
Max.speed 70 km (43 mi) /h[14] 58 km (36 mi) /h[64]
Suspension Hydropneumatic suspension[14]
Crew 4 (commander, gunner, loader, driver)[14]
Armament
Primary 120 mm rifled gun with recoil system[14]
Ammunition APFSDS (MK-I & MK-II), HEAT, HESH, PCB, TB, SAMHO[14]
Secondary 1 × 12.7 mm HCB[14]

1 × MAG 7.62 mm Tk 715 A

1 × 12.7 mm remotely operated gun turret[84]

1 × MAG 7.62 mm Tk 715 A

Protection
Armour Kanchan composite modular armour [14] Improved Kanchan, ERA, NERA[64]
Passive Multi-spectral mobile camouflage, anti-infrared/anti-thermal paint.[85][35]
Active Advanced Laser Warning Countermeasure System (ALWCS) with IR jammer.[35]
12 × 81 mm Anti-thermal Anti-laser Smoke Grenade[14] 16 × 81 mm Anti-thermal Anti-laser Smoke Grenade[24]

Operators[edit | edit source]

  •  India
    • Indian Army
      • 124 Arjun MK1 tanks in service.[86]
      • 2 Mk1A (prototypes) in service, with 118 Mk1A tanks on order.[87][2][88] On 23 September 2021, the Indian Army signed a contract for 118 Arjun Mk.1As with the first five due to be delivered within 30 months.[89][90]
      • 40 130 mm M-46 Catapults based on Arjun chassis.[91]

Failed contracts[edit | edit source]

  •  Bahrain: Bahrain was in talks with India for the procurement of Arjun Mk II, which was reported in March 2022.[92]
  •  Colombia: Colombia expressed interest to purchase the Arjun in 2009.[93]

See also[edit | edit source]

Notes[edit | edit source]

  1. 15 pre-production prototypes (PPS-1 to PPS-15), 124 Arjun MK1, 2 MK1A prototypes.[1][2]
  2. The initial prototypes of the Arjun were equipped with FCS developed for the Vijayanta Mark 1B main battle tanks.[24]
  3. First variant of Arjun MBT is designated as Arjun MK1 or Mark 1.[1]

References[edit | edit source]

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Mann, Maj Gen Rambir (14 April 2021). "Why MBT Arjun Tank should be embraced by the army?". Forum For Integrated National Security (FINS) India. Retrieved 22 June 2021.
  2. 2.0 2.1 2.2 Annual Report 2018-19 (PDF). MoD. p. 103. MBT Arjun Mk-II has been designed and developed incorporating 84 improvements (73 tank fittable) over and above MBT Arjun Mk-I. During the year, two MBT Arjun Mk-1A prototypes were positioned at PFFR
  3. Philip, Snehesh Alex (16 March 2020). "Army set to place order for 118 Arjun Mark 1-As, the most potent tank in its inventory". Retrieved 3 June 2021.
  4. "DRDO successfully test fires laser-guided anti-tank missile". The Times of India. PTI. 1 October 2020. Retrieved 1 October 2020.
  5. "120 mm Penetration Cum Blast (PCB) and Thermobaric (TB) Ammunition For MBT Arjun". DRDO. Ministry of Defence. Retrieved 26 July 2021.
  6. "Arjun Main Battle Tank specifications". OFB. Retrieved 5 August 2021.
  7. Economic Times (14 July 2018). "Fire-power of DRDO's Arjun Tank takes quantum jump with new ammunition: MoD". The Economic Times. Press Trust of India. Retrieved 8 December 2019.
  8. "Battlefield Protection System" (PDF). Defence Research and Development Organisation. Defence Scientific Information & Documentation Centre. Retrieved 10 July 2024.
  9. "Land Defense brochure" (PDF). MTU. Rolls-Royce Group. Retrieved 9 July 2024.
  10. Pubby, Manu (14 February 2024). "India to develop engine for new Arjun tanks". The Economic Times. ISSN 0013-0389. Retrieved 14 February 2024.
  11. "Indigenously developed 1500 HP prototype engine for future main battle tanks test fired". The Hindu. 20 March 2024. Retrieved 20 March 2024.
  12. "MBT Arjun Tank". DRDO. Retrieved 18 July 2021.
  13. 13.0 13.1 Genys, Andrius. "Arjun - Main battle tank". Archived from the original on 12 September 2007. Retrieved 10 December 2019.
  14. 14.00 14.01 14.02 14.03 14.04 14.05 14.06 14.07 14.08 14.09 14.10 14.11 14.12 14.13 14.14 14.15 14.16 14.17 14.18 "Technology focus" (PDF), Technology Focus: Bulletin of Defence Research & Development Organisation, 19 (3), DRDO, June 2011, ISSN 0971-4413, archived from the original (PDF) on 9 August 2011, retrieved 10 June 2011
  15. Press Trust of India (6 March 2013). "A Look at Indian Army's Main Battle Tanks". India TV. Archived from the original on 3 November 2013. Retrieved 4 August 2013.
  16. Press Trust of India (30 June 2015). "Chinese military research academy praises India's Arjun tank". Business Standard India. Press Trust of India. Retrieved 20 June 2021.
  17. 17.0 17.1 17.2 Joshi, Saurabh (25 May 2009). "Army gets first Arjun regiment". StratPost – South Asian Defense and Strategic Affairs. Archived from the original on 29 May 2012. Retrieved 2 December 2011.
  18. Press Trust of India (12 March 2011). "Arjun Tank inducted into 75 armoured regiment". The Times of India. Archived from the original on 3 November 2013. Retrieved 29 June 2013.
  19. 19.0 19.1 19.2 19.3 19.4 19.5 19.6 19.7 "Indigenous Armoured Tracked Vehicles" (PDF). Technology Focus. 19. Defence Research and Development Organisation. 9 August 2011. ISSN 0971-4413. Archived from the original (PDF) on 9 August 2011.
  20. Vikas (29 January 2018). "MBT Arjun is a formidable tank, but can it replace Russian made T-90?". One India. Retrieved 2 October 2020.
  21. 21.0 21.1 21.2 Shukla, Ajai (25 March 2010). "Arjun tank outruns, outguns Russian T-90". Business Standard India. Retrieved 20 June 2021.
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