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Land ForcesRussia

2S31 Vena

Amphibious 120mm self-propelled mortarFielded 2010Pending verification
Land ForcesRUS
2S31 Vena
Photo: Nockson · CC BY-SA 3.0, Wikimedia Commons
Fact cardConfidence · Source
System
TypeAmphibious 120mm self-propelled mortar
Date of introduction2010
ProliferationAt least 4 countries
Crew4Med[1]
Dimensions and weight
Combat weight19.5 tMed[1]
Automotive performance
ChassisBMP-3Med[1]
Engine1 x UTD-29MMed[1]
Engine power500 hpMed[1]
SuspensionHydropneumatic shock absorbersMed[1]
Cruising range600 km373 mi · 324 nmiMed[1]
Max road speed70 km/h43 mph · 38 ktMed[1]
Swim speed9 km/h6 mph · 5 ktMed[1]
FordingAmphibious, 2 WaterjetsMed[1]
Protection
Hull ArmorThe hull of the 2S31 is built from aluminum (possibly the ABT-102 alloy from Nii Stali), which is then covered with bolt-on hardened steel armor. Without the steel, the aluminum protects against small arms fire and shell splinters, and the Med[1]
Turret ArmorThe steel armor protects the crew from small arms fire and shells splinters.Med[1]
Applique ArmorThe vehicles can be fitted with bar armour to provide statistical protection against cumulative projectiles or RPG-7 type weapons. There is an additional armour kit available that appears to add spaced modules to the sides of the hull. It iMed[1]
NBC ProtectionYesMed[1]
Smoke EquipmentYesMed[1]
Armament
Secondary armament1 x PKMT 7.62mm General-Purpose Machine GunMed[1]
Maximum firing range13 km8 mi · 7 nmiLongest-range ammunition listedMed[1]
Fire control
Computerized FCSYes, "Vena" features modern fire control system.Med[1]
Laser DetectorYes, A laser detector is mounted on the low part of the turret front, either side of the 120 mm 2A80 ordnance and on either side of the turret roof at the rear which is used in conjunction with the smoke grenade system.Med[1]
Variants
1B172-2 command vehicleThe 1B172-2 unified artillery command-observation post/command-and-staff vehicle is based on the same hull as the 2S31. It is fitted with additional communications equipment and a mast-mounted sensor package.[1]
120-mm 2S34 KhostaThis is an upgraded 2S1 self-propelled howitzer fitted with the complete 120-mm 2A80 gun from the 2S31, which is fitted with a muzzle brake. See separate record for more information.[1]
Weapons and payload options · 2Confidence · Source
HE FRAG120 mm ammunition
Med[1]
Range
13 km8 mi · 7 nmi
Quantity
70 Rounds
Armor penetration
120-mm 2A80 rifled semi-automatic gun firing mortar bombs, conventional armor-piercing and artillery rounds and Kitolov-2M laser-guided proj
Mortar Bomb120 mm ammunition
Med[1]
Range
7.2 km4 mi · 4 nmi
Quantity
70 Rounds
Summary

The 2S31 Vena is a self-propelled gun/mortar of Russian origin. It was developed as a more capable and more high-end alternative to the wheeled 2S23 Nona.

Draft entry. Values come from the cited public sources and are awaiting editor verification.
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Operators
AzerbaijanRussiaVenezuela
Sources
  1. 2S31 Vena Russian Amphibious 120mm Self-Propelled Mortar, U.S. Army TRADOC G-2 Worldwide Equipment Guide (ODIN)
    Published/updated 2026-03-20 · Tier 1 · checked 2026-10-10
Change log
  • 2026-10-10 Entry created from the Worldwide Equipment Guide (ODIN), bulk import
  • 2026-10-10 Added photo (CC BY-SA 3.0)