Bushmaster manufactured magazines are top quality. Features mil. spec. manufactured components including a hard anodized aluminum box with a baked Teflon finish, standard green AR follower, tempered steel spring, and a removable baseplate stamped with the Bushmaster Snake Logo. They can be easily disassembled for cleaning and lubrication, and we guarantee it will provide excellent fit and function in all 5.56mm / .223 Rem. caliber AR15 type rifles.