M16/AR15 Bolt Carrier Group - MPI M16 BCG (5.56)This M16 bolt carrier group drops right into your M16, AR15 or M4 platform rifle and features:These are being sold as light blems due to the gas key not having a chrome lined bore. This is very common and will not affect functionality. The bore of the carrier is chrome lined. Enhanced 9310 (bolt)8620 tool steel (carrier)Chrome lined carrier (auto)Phosphate gas keyS7 tool steel extractorMil-spec extractor spring, black extractor insert, Viton O-ringShrouded firing pinMil-Spec gas key (4130 Steel) attached with Grade 8 hardware and properly stakedBolt is shot peened and MPI
MPN#: PH9310

Price History Chart