B-11 recoilless rifle

107mm B-11 recoilless gun
107mm B-11 recoilless gun
	A gun used by the Polish Armed Forces
Type	Recoilless gun
Place of origin	Soviet Union
Service history
In service	1954−1969 (Soviet Union)
Used by	See users
Wars	Biafran War; Vietnam War; Yom Kippur War; Lebanese Civil War; Gulf War; Bosnian War;
Specifications
Mass	240 kg (530 lb)
Length	356 cm (140 in)
Barrel length	338.3 cm (133.2 in)
Width	145 cm (57 in)
Height	90 cm (35 in)
Crew	5
Shell	High-explosive (HE); High-explosive anti-tank (HEAT);
Shell weight	8.5 kg (19 lb) (HE); 7.5 kg (17 lb) (HEAT);
Caliber	107 mm (4.2 in)
Elevation	-10° to 45°
Traverse	35°
Rate of fire	5−6 rpm
Muzzle velocity	375 m/s (1,230 ft/s) (HE); 400 m/s (1,300 ft/s) (HEAT);
Effective firing range	450 m (1,480 ft) (HEAT round)
Maximum firing range	6,650 m (21,820 ft) (HE round)
References

The B-11 recoilless gun, also known as RG-107 (Rückstoßfreies Geschütz) is a Soviet 107 mm (4.2 in) smoothbore recoilless weapon firing fin-stabilized HE and HEAT rounds. It entered Soviet service in 1954. By the 1970s, it was no longer in service, having been replaced by the SPG-9, though as of 2025, it remains in use with other countries.

The B-11 would see use in conflicts in the Sub-saharan Africa, the Balkans, the Middle East, and Southeast Asia regions.