Aero Precision DPMS format AR-308 complete bolt carrier group is mil-spec phosphate coated. Designed to function with .308, 7.62x51, 6.5 Creedmoor, .338 Federal and other .308 based cartridges.
Carrier is machined from 8620 case hardened steel, with a 4130 steel properly staked gas key and has forward assist serrations.
Bolt is made from case hardened, shot peened and phosphate coated 9310 steel. Magnetic particle inspected and high pressure tested.