Bravo Company, BCM MK2 Recoil Mitigation System, Mod 1, 8 Position Buffer Tube Complete Assembly, Matte Finish, Black, Includes T1 Buffer, M16A4 Rifle Action Spring, MK2 Receiver Extension, QD End Plate, Castle Nut, Fits AR Rifles 4.7oz buffer weight offers Increased internal counterweight travel to reduce bolt bounce Internal spring to reduce noise of counter weight shifting and ensure more consistent weight placement Mil-Spec M16A4 rifle spring with more spring coils than M4 carbine, increases consistency and widens operating envelope 8 Position buffer tube for extended adjustability Whether starting a new rifle build or upgrading an existing one the BCM MK2 recoil mitigation system offers less felt recoil while maintaining and improving reliability. Comes as a complete kit ready to mount on any AR pattern rifle.