Arm or Ally AR-10 / .308 Bolt Carrier Group - Nickel Boron

Arm or Ally AR-10 / .308 Bolt Carrier Group – Nickel Boron

Made in the U.S.A – Lifetime Warranty

The Arm or Ally AR-10 / .308 Bolt Carrier Group – Nickel Boron is built to exacting standards using premium materials and military-grade manufacturing processes. Featuring a 9310 steel bolt and an 8620 steel carrier, this BCG is engineered for durability, reliability, and smooth operation. It is fully compatible with DPMS-pattern AR-10 platforms and supports most calibers in the .308 Winchester family.

This AR-10 BCG is produced by a trusted OEM supplier for the U.S. military and many top-tier firearm manufacturers. Designed for builders and serious shooters alike, it delivers the same performance as name-brand competitors—without the markup. Whether you’re running .308, 7.62 NATO, or another compatible caliber, this BCG delivers dependable function and comes backed by a 100% hassle-free Lifetime Warranty.

Note: If you are building a 6.5 Creedmoor rifle, we recommend our Toolcraft 6.5 Creedmoor Nickel Boron Bolt Carrier Group which is optimized for the higher-pressure cartridge.

** Double ejector model is available HERE. **

Carrier Specifications

• Manufacturer: Leading U.S. Manufacturer
• Material: 8620 Steel
• Gas Key Material: 4130 Steel; Grade 8 Gas Key Screws
• Finish: Nickel Boron Coated
• Forward Assist Serrations: Yes
• Compatibility: DPMS Pattern

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

If you’re looking for long-lasting performance with a sleek, corrosion-resistant finish, the Arm or Ally AR-10 / .308 Nickel Boron BCG delivers value and confidence for your next build or upgrade.