AR15 Toolcraft Nickel Boron BCG


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5.56 NATO / .223 Rem, 9310 Steel -or- Carpenter 158 Bolt, Nickel Boron Coated, MPI Inspected, Lifetime Warranty
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AR15 Toolcraft Nickel Boron BCG

Simply the best 5.56 NATO NiB Bolt Carrier Group on the market! Available in either 9310 or C158 Steel Bolt.

AR15 Toolcraft Nickel Boron BCG is a Full-Auto M16 BCG, manufactured using the finest U.S sourced raw materials available. The Nickel Boron coating vastly increases the lubricity and wear resistance while preventing corosion.  The Bolt Carrier Group is the heart of your rifle, and if you want to upgrade the functionality and appearance 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 internets largest authorized stocking dealer of Toolcraft Products. 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.

Be sure to see all of our other growing selection of core AR parts to include bolt carrier groups, barrels, triggers and many other AR15 and AR10 parts.

Please Note: Some dealers utilize a third party coating service to keep their costs down. If purchasing a Toolcraft bolt carrier group from one of these dealers, Toolcraft will void the coating warranty. All Toolcraft Bolt Carrier Groups sold by Arm or Ally include the manufacturers 100% no-questions-asked warranty.

Lifetime Warranty & Made in the U.S.A

Product Specifications


Manufacturer: Toolcraft
Material: 8620 Steel
Type: M16 Full Auto
Gas Key Material: 4130 Steel; Grade 8 Gas Key Screws
Coating: Nickel Boron (NiB)


Caliber: 223 Rem | 5.56 NATO
Bolt Material: 158 C -or- 9310 Steel
Coating:  Nickel Boron (NiB)
Extractor: Machined
Extractor Material: D2 Tool Steel
O-Ring: Mil-Spec (3)
Cam Pin Material: 8620 Steel
Firing Pin Material: 416 Stainless Steel
Other: MPI Inspected | Shot Peened

Weight 12 oz
Dimensions 8.5 × 1.5 × 1.5 in


Part Type

Bolt Carrier Group, Upper Receiver Parts




223 Remington, 223 Wylde, 5.56 NATO

Coating Type

Nickel Boron

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