Toolcraft AR10 / 308 Bolt Carrier Group - Nickel Boron


Original price was: $329.99.Current price is: $141.37.

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Toolcraft AR10 Nickel Boron Bolt Carrier Group

Made in the U.S.A – Lifetime Warranty

The Toolcraft AR10 Nickel Boron Bolt Carrier Group is manufactured using a 9310 steel bolt and an 8620 steel carrier. DPMS Compatible with most calibers in the 308 parent cartridge family. If building a 6.5 Creedmoor, we also offer a Toolcraft 6.5 Creedmoor Nickel Boron Bolt Carrier Group which is 100% compatible with the high-pressure 6.5 Creedmoor Cartridge.

Toolcraft is an OEM for the U.S. military and many other large rifle manufacturers, producing the most popular, and well built AR10 bolt carrier group on the market. Forget the fancy logo at a $75 premium, and buy directly from Arm or Ally, the internet’s largest dealer of Toolcraft products. All of our Toolcraft Bolt Carrier Groups come with a 100% hassle free Lifetime Warranty – should any Toolcraft product fail, contact us for replacement.

We are proud to feature Toolcraft products along with our already fantastic line-up of reputable manufacturers. We also offer a Toolcraft 308 Double Ejector BCG for the ultimate in reliability. The 308 dual ejector BCG features a 0.065″” reduced diameter firing pin, and firing pin channel. Historically, the large format AR10 variants are known to have ejection problems. The addition of the second ejector ensures consistent ejection and greatly improves the reliability of your AR10 rifle.

** Double ejector model is available HERE. **

Carrier Specifications

  • Manufacturer: Toolcraft
  • Material: 8620 Steel
  • Gas Key Material: 4130 Steel; Grade 8 Gas Key Screws
  • Finish: Nickel Boron Coated
  • Forward Assist Serrations: Yes
  • Compatibility: DPMS

Bolt Specifications

  • Caliber: 308 Winchester Family
  • Finish: Nickel Boron Coated
  • Bolt Material: 9310 Steel
  • Extractor Material: D2 Steel
  • Mil-Spec O-Ring
  • Mil-Spec Gas Rings (3)
  • Cam Pin Material: 4140 Steel
  • Firing Pin Material: 8740 Stainless Steel
  • Other: MPI Inspected; DPMS Compatible
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 are manufactured and plated / coated by Toolcraft and include a 100% no-questions-asked warranty.

Product Information






308 Win

Carrier Material

8620 Steel

Bolt Material

9310 Steel


Nickel Boron




Standard DPMS AR10 Components


MPI Inspected, Shot Peened, FA Serrations

Made in USA




Arm or Ally

Arm or Ally is a stocking dealer for all Aero Precision, Faxon Firearms, Ballistic Advantage, HOLOSUN, Toolcraft, Elftmann Tactical, Timney, TriggerTech, HIPERFIRE and was named the #1 Overall E-Commerce Dealer for Aero Precision Products in 2020!

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