Rubber City Armory Blacknitride+ M16 Bolt Carrier Group w/ Adjustable Gas Key

FEATURES:Strong, easy-to-clean, enhanced heat treated Blackntride+ finish inside and outRevolutionary treatment eliminating the need for excessive oil or grease on tactical componentsSynthetic fluoropolymer of tetrafluoroethylene to each part to reduce friction and improve wearPrecision machined boltBillet Adjustable Gas key is properly stakedMade in the U.S.A.SPECIFICATIONS:Caliber: 5.56 NATO / .223 Rem. / 300BLKWeight: 11.5 oz.Finish: Blacknitride+Material:Carrier: 8620 SteelBolt: 9310 SteelProfile: M16COMPATIBILITY:AR-15INCLUDES:1x Steel Bolt Assembly1x Extractor1x Cam Pin1x Low Mass Steel Bolt Carrier1x Billet Adjustable Carrier Gas Key1x Firing Pin1x Firing Pin Retaining Pin