GP-25

GP-25 grenade launcher
GP-25 grenade launcher
Type	Grenade launcher
Place of origin	Soviet Union
Service history
In service	1978–present
Used by	See Users
Wars	Afghan conflict Soviet–Afghan War; War in Afghanistan; ; Transnistria war; First Chechen war; Second Chechen War; Russo-Georgian War; Syrian Civil War; Russo-Ukrainian War War in Donbas; Russian invasion of Ukraine; ; Yemeni Civil War Saudi Arabian-led intervention in Yemen Houthi–Saudi Arabian conflict; ; ;
Production history
Designer	TsKIB SOO
Designed	1966–1978
Manufacturer	Kalashnikov Concern; STC Delta; Arsenal AD; Zastava Arms
Produced	1978–present
Variants	GP-30, GP-30M, GP-34
Specifications
Mass	1.5 kg (3.31 lb) (GP-25); 1.3 kg (2.9 lb) (GP-30); 1.4 kg (3.1 lb) (GP-34)
Length	323 mm (12.7 in) (GP-25); 275 mm (10.8 in) (GP-30); 315 mm (12.4 in) (GP-34)
Barrel length	120 mm (4.7 in)
Cartridge	40 mm internal propellant caseless ammunition (CL)
Caliber	40 mm
Action	Closed system, single-shot
Rate of fire	20 rounds/min area suppression; 5–6 rounds/min aimed shots
Muzzle velocity	76.5 m/s (251 ft/s)
Effective firing range	Sights adjustable 100 to 400 meters
Feed system	Muzzleloader
Sights	Notched quadrant sight

The GP-25 Kostyor ("Bonfire"), GP-30 Obuvka ("Shoe") and GP-34 are a family of Russian 40 mm under-barrel muzzleloaded grenade launchers for the AK family of assault rifles. The acronym GP stands for Granatomyot Podstvolnyj, "under-barrel grenade launcher" in Russian, and was adopted by Soviet forces in 1978.