This is a rare M1A2 grenade adapter for launching hand held grenades off US GI grenade launchers for Garand, Springfield and also many European rifles. It has three prongs, a base cup to secure the grenade, and slotted tailfins. It was an improved version of the M1A1 with a reinforced tube and redesigned tailfins. The grenade adapter has an olive drab painted, sheet metal construction with official markings identifying the model and lot number. This genuine 1945 era military collectible is something that you don’t want to miss getting your hands on before they’re all gone.