BattleHawk Armory AR-15 5.56 / 300 Enhanced Black Nitride Complete Bolt Carrier Group - BCG Engineered for reliability, precision, and smooth operation, the BattleHawk Armory Enhanced BCG is the premium upgrade your AR-15 build deserves. Compatible with 5.56 NATO, .223 Remington, and .300 Blackout platforms, this complete bolt carrier group is finished in ultra-durable Black Nitride-offering enhanced corrosion resistance, improved lubricity, and an exceptional service life. The enhanced bolt carrier design reduces tilt and friction, increasing overall reliability and cycling consistency, especially in suppressed or high-round-count setups. With critical components machined from 8620, 9310, and 4340 steels and subjected to Magnetic Particle Inspection (MPI) and High Pressure Testing (HPT), every unit is built to exceed military-grade performance standards. This model features the BattleHawk Armory Hawk Head logo laser-etched on the ejection side-a mark of quality and commitment to precision performance. Bolt Carrier Features: 8620 case-hardened steel carrier body Sleek Black Nitride finish for low-friction performance and reduced maintenance Reinforced ejection port area for added rigidity Precision-milled gas key valley with Grade 8 fasteners-properly staked Hardened 4340 cam pin Centerless-ground 8740 steel firing pin with hard chrome coating Laser-etched BattleHawk Armory Hawk Head logo on the ejection side Bolt Assembly: Precision CNC-ground 9310 case-hardened steel bolt All components Black Nitride treated and shot peened 4340 extractor with Mil-Spec spring and O-ring Fully MPI & HPT tested for superior strength and durability Fits: AR-15/M4-style rifles chambered in 5.56 NATO, .223 Rem, .300 BLK, and 6.8 SPC Proudly made in the USA. Now available at BattleHawk Armory-built for those who demand more from their rifle.