AR15 Bolt Carrier Group Black Nitride 223/5.56

Black Nitride AR15 Bolt Carrier Group

• Shot Peened Black Nitride Finish w/No Logo
• Fits 223 Rem, 5.56 NATO, 300 Blackout, 350 Legend, etc.

   Precision machined complete BCG (Bolt Carrier Group) with Black Nitride finish for the excellent durability and corrosion protection.  Fits guns chambered for 223 Remington, 5.56 NATO, 300 Blackout, 350 Legend, etc. Made to exact compliance with military drawings, then taken to the next level with advanced machining and finishing processes:
   The bolt is 9310 formula steel, heat treated, magnetic particle inspected, with gas rings fitted to Milspec. The carrier is 8620 formula steel, heat treated, and held to the closest internal tolerances for accuracy and reliable function... Including full auto applications. The cam pin and firing pin are Swiss Screw turned and precision ground to achieve the closest dimensional tolerances and straightness. CNC machining and exact heat treating makes the extractor reliable and extremely wear resistant. And finally the Gas Key... CNC machined to comply exactly with military drawings, it gets heat treated, chrome lined, and is then torqued and staked onto the carrier in compliance with full auto military specifications. 
  If you are shopping for an accuracy enhancing AR15/M16/M4 Bolt Carrier Group, you can't buy better than this one... At ANY Price!

E. Arthur Brown Company, Inc
4088 County Road 40 NW, Garfield, MN 56332