2A70
{{Infobox Weapon
| name = 100 mm gun 2A70
| image = File:100 mm 2A70 gun.jpg
| image_size = 300px
| caption = 2A70 at the Motovilikha Plants museum
| origin = {{flagcountry|Soviet Union}}
| type = Gun-launcher
| is_ranged = yes
| is_bladed =
| is_explosive =
| is_artillery = yes
| is_vehicle =
| is_missile =
| is_UK =
| service= 1990–present
| used_by = See Operators
| wars =
| designer = KBP Instrument Design Bureau
| design_date = 1980s
| manufacturer = Motovilikha Plants
| unit_cost =
| production_date = mid 1980s–present
| number = 2000+
| variants =
| spec_label =
| weight = {{convert|311.6|kg|lb}}
| length = {{convert|3943|mm|in}}
| part_length= > 3 m
| width = {{convert|281|mm|in}}
| height = {{convert|404|mm|in}}
| diameter =
| crew =
| cartridge =
| caliber = {{convert|100|mm|in}}
| barrels = 1, rifled, no bore evacuator or muzzle device
| action =
| rate = 8–10 rounds per minute
| velocity = See table
- 3OF32: {{convert|250|m/s|ft/s|abbr=on}}
- 3OF70: {{convert|355|m/s|ft/s|abbr=on}}
| range = 3OF32: {{convert|300|m|ft|abbr=on}}–{{convert|4000|m|ft|abbr=on}}
| max_range = 3OF70: {{convert|6500|m|ft|abbr=on}}
| feed = autoloader (shell); manual (shell and missile){{cite web|url=https://weaponsystems.net/system/1019-100mm+2A70 |title=100mm 2A70|publisher=weaponsystems.net|accessdate=2023-05-01}}
| sights =
| breech =
}}
The 100 mm gun-launcher 2A70 (GRAU designation: {{Lang|ru|2А70}}) is a model of low-pressure rifled cannons designed in the Soviet Union by the KBP Instrument Design Bureau. Integrated into Bakhcha-U and Sinitsa turret modules, the gun equips the BMD-4, BMP-3, and BTR-90M infantry fighting vehicles. It is capable of launching the high-explosive fragmentation (HE-FRAG) 3OF32 and 3OF70 projectiles, as well as the 9M117 Bastion gun-launched anti-tank guided missiles (ATGM) and related systems.
China produces a similar gun used on the ZBD-04 IFV, using technologies licensed from Russia in 1996.{{cite web|url=https://www.toutiao.com/article/7133877818844365316/ |title=大国善谋,武器维护保养换过时产品,26年后中国却玩出先进步战车 |website=Toutiao |date=25 August 2022 |language=Chinese}} The VN20 has a version with a 100-mm gun.{{Cite web |date=2023-02-11 |title=The VN20 Is The Largest Combat Vehicle In Asia {{!}} 21st Century Asian Arms Race |url=https://21stcenturyasianarmsrace.com/2022/12/03/the-vn20-is-the-largest-combat-vehicle-in-asia/ |access-date=2023-02-18 |archive-date=2023-02-11 |archive-url=https://web.archive.org/web/20230211155213/https://21stcenturyasianarmsrace.com/2022/12/03/the-vn20-is-the-largest-combat-vehicle-in-asia/ |url-status=usurped}}
History
By no later than 2006, the then-standard projectile 3OF32 was found to be underpowered. Being modified from the WW2 52-OF-412 projectile of the 100 mm field gun M1944 (BS-3), it was designed to withstand a higher ballistic-performance gun and thus has too thick walls and insufficient explosive filling.[https://web.archive.org/web/20060621072410/http://btvt.narod.ru/4/bmp3mod.htm Боекомплект Бмп-З]
Ammunition
The 3OF32 has a point-detonating (impact) fuse.{{cite web |title=CAT-UXO - 100mm OF-32 projectile |url=https://cat-uxo.com/explosive-hazards/projectiles/100mm-of-32-projectile |website=cat-uxo.com |language=en}}