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

The NBS AR-15 5.56/.223 Left-Handed BCG is the perfect starting point for our wrong-handed friends. This BCG has one of the best black nitride finishes we have seen, and comes in a mil-spec design with a lifetime warranty. The bolt is made from enhanced 9310 steel while the carrier is made from 8620 tool steel. It is shot-peened and magnetic particle inspected.Included:Bolt w/ D2 ExtractorBolt Carrier w/ staked Gas KeyCam PinFiring PinFiring Pin Retaining PinTechnical Specs: Gas system: Direct ImpingementCaliber: 5.56x45mm NATO/.223 Rem, .300 BlackoutFinish: Salt Black NitrideBolt: 9310 Alloy Steel (High Hardness)Carrier: 8620 Aircraft Grade SteelExtractor: Shot Peened and Case Hardened D2 Tool SteelFiring Pin: Mil-spec 8740 steel with hard chrome finishGas Key: Mil-Spec w/ properly staked Grade-8 screws & Permatex No. 3 sealedCam Pin: 8620 Steel w/ Black Nitride FinishQuality Control: MPI Inspected for QC