GP-25

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.