How a Russian GP-25 Grenade Launcher Works

Wikipedia: The GP-25 and GP-34 are a family of Russian 40 mm under-barrel grenade launchers for the AK family of assault rifles. They were first seen by the West in 1984 during the Soviet Invasion of Afghanistan. The GP-30 was lightened and the redesigned sighting system was moved to the right. The current Izhmash-made version, the GP-34, has an again redesigned sighting system on the right and features the following advantages: Reliability: It is designed and tested specifically for the Kalashnikov assault rifles, fits such assault rifles directly without any adaptors or forearm dismantling. Improved safety: The design prevents a round from moving within or falling out of the barrel, even if the muzzle is pointed down. The GP-34 features an additional mechanism (firing pin safety lever) to improve safety during loading. The grenade launchers are similar in appearance and fire the same 40 mm caliber ammunition and use the same High-Low System developed by Germany in late World