AR-15 223/5.56/300 Blk/350 Legend Nitride Full Auto Bolt Carrier Group

-We get our Bolt Carrier Groups from a variety of reputable manufacturers e.g. PSA, Toolcraft, Azimuth, DRG Manufacturing, Microbest, Unbranded AR etc. Our stock varies weekly. Sorry but we cannot accomodate any request for a specific brand. -Caliber: 223 REM /5.56 NATO / 300 Blackout / 350 Legend-Finish: Nitride-Profile: Full Auto M16-Bolt Material: 9310 Steel or C-158-Carrier Material: 8620 Steel-Carriers are assembled per MIL-SPEC using permatex NO.3D aviation and Grade 8 screws to attach the gas key, followed by proper staking. Crane O-ring installed on extractor spring to ensure proper ejection. Bolt is heat treated 9310 tool steel and shot peened. -Made in the USA