Bravo Company MK2 Recoil Mitigation System, Mod 1, 8 Position Buffer Tube Complete Assembly, Matte Finish, Black, Includes T0 Buffer, M16A4 Rifle Action Spring, MK2 Receiver Extension, QD End Plate, Castle nut, Fits AR Rifles BCM-MK2RMS-M1T0 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.