BattleHawk Armory AR-15 5.56 Black Nitride Left-Handed Complete Bolt Carrier Group - Left Side Eject Engineered for left-handed shooters who demand top-tier performance, the BattleHawk Armory Left-Handed BCG brings uncompromising reliability and smooth operation to AR-15 platforms chambered in 5.56 NATO, .223 Remington, and .300 Blackout. Featuring true left-side ejection and a Black Nitride finish, this complete bolt carrier group is purpose-built for mirror-configured uppers, ensuring flawless cycling and a more intuitive shooting experience for southpaws. Constructed from premium materials and precision-machined to mil-spec tolerances, this BCG delivers reduced friction, superior corrosion resistance, and long-lasting durability in any environment. Carrier Group: Case-hardened 8620 steel carrier body Black Nitride finish for enhanced wear resistance and low-maintenance operation True left-hand configuration with left-side ejection Gas key made from 4130 steel, staked with Grade 8 hardware into a precision-milled valley 4340 hardened steel cam pin Centerless-ground 8740 steel firing pin with hard chrome coating Bolt Assembly: CNC-ground bolt made from 9310 case-hardened steel Black Nitride coated and shot peened for strength and longevity 4340 extractor with Mil-Spec spring & O-ring combo Fully Magnetic Particle Inspected (MPI) and High Pressure Tested (HPT) Fits: Left-handed AR-15/M4-style rifles chambered in 5.56 NATO, .223 Rem, and .300 Blackout Proudly made in the USA. Now available at BattleHawk Armory-finally, a BCG that works as hard as lefties do.