This pump shotgun vertical foregrip for ATI MB3 shotguns is foldable and adjustable with five positions. The forend grip will mount on any ATI MB3 shotgun equipped with a picatinny or weaver rail on the forend. The shotgun grip is ergonomic and non-slip. Simply install a picatinny rail mount on your shotgun forend and you're done. It is constructed of heavy-duty polymer for years of use. It fits on any MIL-STD-1913 picatinny rail on tactical shotguns and the AR-15 rifle picatinny rail handguard. Picatinny rails are sold separately. Made in USA. Limited lifetime warranty.