5.56 NATO FULL-AUTO PROFILE BOLT CARRIER GROUP - 35099

5.56mm Full-auto profile Bolt Carrier GroupFor AR15 and M16 rifles and carbines.  Made by a mil-spec contractor, these feature a Carpenter 158 Bolt, and a full profile chrome lined carrier.Bolt is made of shot-peened, Mil-spec Carpenter 158® steel. Gas key is secured with grade 8 fasteners and staked. Bolt carrier is parkerized outside and chrome lined inside.Bolt is not marked.