The GP-25 is Russian under barrel grenade launchers for the AK-series of assault rifle. First seen by the west in 1984 during the Soviet Invasion of Afghanistan.

Full Metal Construction
Military Type Airsoft Grenade Launcher for Under barrel or standalone use
Quick install and removing (Safety lock at right side)
Package Includes one 40mm Grenade Cartridge (VOG-25 style grenades) -- Contain 6 Slots & each slot can store 6 Rounds of 6mm airsoft pellet w/ total 36rds Capacity
One shot can shoot out all 36 Rounds of 6mm Plastic Pellet
Fit to mount on AK-74 Series Airsoft AEG Rifle