The Noveske 5.56/300BLK DLC Enhanced Bolt Carrier Group is a premium, full-auto-profile internal component group meticulously engineered for small-frame AR-15 platforms. The robust carrier is machined from domestic, aircraft-grade proprietary 8620 steel and treated with a Diamond-Like Carbon (DLC) finish that yields exceptional hardness, minimizes friction, and makes carbon fouling easy to clean. At its core, the high-fatigue Carpenter 158 steel bolt features a protective black manganese phosphate coating and is fully shot-peened and magnetic particle tested (MPI) to guarantee high-pressure cycling reliability. Gas efficiency is strictly managed via a heat-treated USGI-spec gas key secured with Grade 8 fasteners, which are precision-staked alongside a chrome-lined gas key interior and a chrome-lined carrier bolt bore. Finished with an engraved Noveske Iron Cross logo on the side of the carrier, this drop-in assembly drops effortlessly into standard upper receivers to optimize function for both suppressed and unsuppressed setups.