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}}