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2S31 Vena

120-mm self-propelled mortar system

2S31 Vena

The 2S31 Vena mortar system is designed to support mechanized infantry formations

Entered service 2013
Crew 4 men
Dimensions and weight
Weight ~ 19.5 t
Length (gun forward) 7.4 m
Hull length 6.75 m
Width 3.15 m
Height ?
Main gun 120-mm gun/mortar
Machine guns 1 x 7.62-mm
Projectile weight 17.3 kg
Maximum firing range 7.2 - 13 km
Maximum rate of fire 8 - 10 rpm
Elevation range - 4 to + 80 degrees
Traverse range 360 degrees
Ammunition load
Main gun 70 rounds
Machine guns 500 rounds
Engine UTD-29 diesel
Engine power 500 hp
Maximum road speed 70 km/h
Amphibious speed on water 10 km/h
Range 600 km
Gradient 60%
Side slope 30%
Vertical step 0.8 m
Trench 2.5 m
Fording Amphibious


   The 2S31 Vena (vein) self-propelled mortar system was revealed in 1997. This vehicle is designed to support mechanized infantry formations. The 2S31 Vena mortar system has been trialed by the Russian Army. However its small scale production commenced only in 2013. A total of 15 units have been exported to Azerbaijan.

   The 2S31 Vena is armed with a 120-mm rifled gun/mortar. It is a further development of the 2A51 gun, mounted on the 2S9 Nona-S. The 2S31 Vena has longer firing range comparing with the 2S9 Nona-S, even though it uses the same ammunition. This mortar system can be used as mortar or howitzer, delivering direct or indirect fire. Maximum range of fire is 7.2 km with mortar mines and 13 km with gun shells. Various munitions can be used, including HEAT, HE-FRAG, smoke. Vena is compatible with all munitions, developed for the Soviet/Russian 120-mm combined gun/mortar systems. It can also fire any 120-mm mortar rounds. For precision attacks against armored targets the 2S31 uses Kitolov-2M precision guided munitions.

   Secondary armament consists of 7.62-mm remotely-controlled machine gun, mounted on top of the roof.

   At the time of its introduction the Vena was fitted with a very advanced fire control system, which ensures a high first-round-hit probability. Fire control system includes reconnaissance, target acquisition, navigation and positioning systems.

   Armor of the 2S31 Vena provides protection against small arms fire and artillery shell splinters. Vehicle is fitted with NBC protection and automatic fire suppression systems.

   Vehicle has a crew of four, including commander, gunner, loader and driver.

   The 2S31 Vena mortar system is based on the much modified BMP-3 IFV chassis. Vehicle is powered by the UTD-29 diesel engine, developing 500 horsepower. The Vena is fully amphibious. On water it is propelled by two waterjets.


Video of the 2S31 Vena self-propelled artillery system

2S31 Vena

Prototype of the 2S31 Vena

Prototype of the 2S31 Vena

2S31 Vena

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