.223/5.56/300BLK M16 Profile Left-Handed Bolt Carrier Group Black Nitride

.223/5.56/300BLK M16 Profile Left-Handed Bolt Carrier Group Black NitrideEnhance your AR-15's functionality with Black Rifle Depot's Left-Handed BCG for .223/5.56/.300BLK. Precision-engineered for left-handed operators, this bolt carrier group features top-quality 9310 alloy steel in the bolt and 8620 aircraft-grade steel in the carrier, ensuring outstanding durability and performance. The black nitride finish adds a sleek look and enhances corrosion resistance and surface hardness. Fully equipped with a D2 steel extractor and MIL-SPEC components, including a staked gas key and shot-peened parts, this BCG is designed for direct impingement systems. It undergoes rigorous magnetic particle inspection, guaranteeing flawless operation. Backed by a lifetime warranty, this BCG is a reliable upgrade for shooters seeking superior quality and left-handed configuration.Specifications Gas system: Direct Impingement Caliber: 5.56x45mm NATO/.223 Rem, .300 Blackout Finish: Salt Black Nitride Bolt: 9310 Alloy Steel (High Hardness) Carrier: 8620 Aircraft Grade Steel Extractor: Shot Peened and Case Hardened D2 Tool Steel Firing Pin: Mil-spec 8740 steel with hard chrome finish Gas Key: Mil-Spec w/ properly staked Grade-8 screws & Permatex No. 3 sealed Cam Pin: 8620 Steel w/ Black Nitride Finish Quality Control: MPI Inspected for QCIncludes Bolt w/ D2 Extractor Bolt Carrier w/ staked Gas Key Cam Pin Firing Pin Firing Pin Retaining Pin