Toolcraft AR10 / 308 Bolt Carrier Group - Black Nitride

Toolcraft AR10 / 308 Bolt Carrier Group – Black Nitride

The Toolcraft AR10 / 308 Bolt Carrier Group – Black Nitride is a durable, U.S.-made component designed for use in AR-10 platforms chambered in .308 Winchester and related cartridges within the 308 parent family. Manufactured with a 9310 steel bolt and an 8620 steel carrier, this BCG is fully compatible with DPMS-pattern rifles and offers reliable cycling for a variety of AR-10 builds.

The Black Nitride finish enhances surface hardness, corrosion resistance, and lubricity, making this BCG easier to clean and longer lasting under high-volume use. The bolt is MPI-inspected for integrity and includes a machined extractor with a Mil-Spec O-ring, ensuring proper case retention and extraction. The carrier features a properly staked 4130 steel gas key with Grade 8 fasteners and forward assist serrations to ensure full functionality in DPMS-compatible receivers.

Toolcraft is an established OEM for the U.S. military and several top rifle manufacturers, known for producing high-quality bolt carrier groups trusted by professional users. All Toolcraft BCGs purchased through Arm or Ally are covered by a 100% hassle-free lifetime warranty, ensuring long-term reliability and customer confidence.

This model is compatible with most calibers in the .308 Winchester cartridge family. However, for rifles chambered in high-pressure calibers such as 6.5 Creedmoor, Toolcraft recommends selecting a purpose-built BCG for optimal performance. Arm or Ally offers a dedicated Toolcraft 6.5 Creedmoor Bolt Carrier Group for that application.

For users seeking even greater reliability, a double ejector version of the 308 BCG is also available. The dual ejector model incorporates a 0.065″ reduced diameter firing pin and matching channel, specifically designed to address common ejection issues in large-frame AR platforms. For those applications, consider the Toolcraft 308 Double Ejector BCG.