Soviet B-11 (RG107) 107mm recoilless gun. The B11 was designed primarily as an anti-tank gun, able to pierce 350mm of armour at 450m, it was light and mobile enough on its two-wheeled carriage to be maneuvered in battle by its five-man crew using the light tow-bar attached below the muzzle. Although the B11 can, like the smaller but similar B10, be fired from its wheeled mount, the motor-car-type wheels were awkward and were often removed whilst the gun was raised on its tripod.