This complete 223/5.56 bolt carrier group includes Mil-Spec bolt, M16 type, bolt carrier, firing pin, retainer, and cam pin. It has a black manganese phosphate coating with ceramic lined bolt carrier and gas key. The M16 5.56/223/300 AAC complete bolt and carrier group is phosphate coated and chrome lined. The carrier is made from 8620 steel, and the Bolt is made from 9310 steel and phosphate coated, MPI tested.
- The 223 bolt and bolt carrier assembly comes complete with cam pin, firing pin and firing pin retainer
