Aero Precision AR15 5.56 Bolt Carrier Group, Phosphate - APRH100399C

M16-cut bolt carrier group machined from 8620 steel with mil-spec phosphate coating, designed for AR-15 5.56 platforms. Features chrome-lined gas key and bolt channel, properly staked gas key, forward assist serrations, and 5.56 bolt machined from Carpenter 158 tool steel with shot peening. HPT tested and MPI marked for quality assurance.