Toolcraft 5.56 NATO Black Nitride Bolt Carrier Group



Simply the best 5.56 NATO bolt carrier group on the market! Available in either 9310 or C158 Steel Bolt.

Toolcraft 5.56 NATO Black Nitride Bolt Carrier Group is a Full-Auto M16 BCG, manufactured using the finest U.S sourced raw materials available. The Black Nitride coating vastly increases the hardness of the steel, prevents corrosion, is highly resistant to wear, will not flake (it’s not a coating, it’s a bond), and has increased lubricity when compared to a phosphate finished BCG. The Bolt Carrier Group is the heart of your rifle, and if you want to upgrade the functionality of your rifle, this is a great way to do it! If you’re after the newest high-performance BCG finish, ensure you take a look at the DLC Coated BCG’s.

Arm or Ally is the internet’s largest authorized stocking dealer of Toolcraft Bolt Carrier Groups. When you want one of the best looking and performing Bolt Carrier Groups available today, choose a Toolcraft. Toolcraft is a major OEM Manufacturer for the U.S. Military and several other rifle manufacturers. Forget the fancy logo at a $75 premium; Have confidence the heart of your AR Rifle is 100% made in the USA, and Toolcraft has you protected with their no-questions-asked Lifetime Warranty.