B-11 recoilless rifle

The B-11 recoilless rifle (It is also known as RG107) is a Soviet 107 mm smoothbore recoilless gun. It entered service in 1954, and was typically towed by a 6x6 ZIL-157 truck or a UAZ 4x4 truck.

Designed by KB Mashinostroyeniya (KBM), Kolomna.

It is fitted using a PBO-4 sight which has a 5.5x zoom direct fire sight and a 2.5x zoom sight for indirect fire.

Specifications

 * Crew: 5
 * Calibre: 107 mm (4.21 in)
 * Weight: 304.8 kg (672 lb)
 * Length: 3.56 m (11.67 ft) (travel position)
 * Barrel length: 3.383 m (11 ft)
 * Height: 1.19 m (3.90 ft) (firing position). 0.9 m (3 ft) (travel)
 * Traverse: 35 degrees in each direction
 * Elevation: -10/+45
 * Rate of fire: 6 rounds per minute

Ammunition

 * BK-883 - HEAT. Projectile 7.51 kg (16.5 lb). Complete round 12.5 kg (27.5 lb). Warhead 1.06 kg (2.3 lb) of RDX/Aluminium. GK-2 PIBD fuze. Range: 450 m (490 yd) (effective) 1,400 m (1,530 yd) (max). Penetration 381 mm (15 in). Muzzle velocity
 * O-883A - FRAG-HE. Projectile 8.5 kg (19 lb). Complete round 13.5 kg (30 lb). Warhead 2.088 kg (4.6 lb) Amatol 80/20. GK-2 PIBD fuze. Muzzle velocity: 375 m/s (1,230 ft/s). Range: 1,300 m (1,420 yd) (direct) 6,650 m (7,270 yd) (indirect)

Users
Current users
 * 60
 * 🇦🇴 Angola
 * 🇰🇭 Cambodia
 * 🇪🇹 Ethiopia
 * 🇮🇷 Iran
 * Laos
 * 🇰🇵 North Korea
 * Syria
 * Vietnam

Former users
 * USSR
 * 🇧🇬 Bulgaria
 * 🇨🇳 China
 * East Germany
 * 🇪🇬 Egypt
 * 🇮🇩 Indonesia
 * 🇮🇶 Iraq
 * 🇳🇬 Nigeria: some used during Biafran War
 * North Vietnam
 * 🇵🇱 Poland
 * 🇸🇴 Somalia
 * 🇷🇴 Romania