203d Military Intelligence Battalion, US Army Operator's Manual for the AK-47 Assault Rifle (August 2019)
“ Only blank ammunition may be fired when the blank firing device is in place. Do not use the cap or the combination tool kit as a blank firing device. HAND GRENADE LAUNCHER: The hand grenade launcher is installed by removing the muzzle nut (fig. 53) and screwing the launcher onto the weapon (fig. 54) . TO FIRE THE GRENADE: Insert a grenade with the pin pulled into the launcher. CAUTION: A special type cartridge is used for firing the grenade. Place the butt of the weapon on the ground and fire from this position. The maximum effective range the grenade can be fired is 250 meters. ”
