The Brownells M16 5.56 Complete Bolt Carrier Group is designed to work easily and reliably in any AR-15 or M16 rifle chambered in 5.56x45mm, 300 AAC Blackout or .223 Remington. The bolt is made from 9310 steel and treated with heat, shot peening; the carrier is manufactured from 8620 hardened steel; all components receive a black nitride coating and magnetic-particle inspection. Included with the bundle is a standard AR-15 charging handle and a PMAG Gen M2 30-round magazine (10-pack). The charging handle is machined from aluminum with a matte black anodized finish. The PMAG Gen M2 magazines are 30 rounds each and are widely used in AR-15 platforms.