120-mm 2S31 Vena self-propelled cannon

The 120-mm 2S31 Vena self-propelled gun is based on the BMP-3 tracked chassis, giving it amphibious capability. Several basic parts are compatible with those in other vehicles based on the BMP-3. It is said to be more capable than the older 2S9 Nona and 2S23 Nona-SVK gun-mortar systems.

In this application, the crew seats typically mounted on either side of the driver in the BMP-3 have been removed along with the bow-mounted 7.62-mm machine guns and firing ports in the rear troop...