CMC Enhanced Bolt Carrier Group - AR-15 5.56/223/300 Blackout

The flared rear of the carrier reduces tilt and cant during recoil, minimizing wear and improving operational consistency. Precision CNC grinding after heat treatment ensures a smooth surface for easier maintenance and extended service life, especially in suppressed or short-barreled rifle configurations.

Features

• Black Nitride finish for enhanced corrosion resistance
• Flared rear carrier design reduces tilt/cant and friction
• Enlarged forward ports for optimized suppressor use
• 9310 case-hardened steel bolt, shot peened and CNC ground
• Hardened 4340 cam pin and Mil-Spec 8740 steel firing pin
• MPI and HPT tested for quality assurance
• Mil-Spec extractor spring and O-ring
• Compatible with .223/5.56/300 Blackout AR-15 platforms

Specifications

• Brand: CMC Triggers
• MPN: 81631
• UPC: 810943030961
• Color: Black
• Finish: Black Nitride
• Carrier Material: Case-hardened 8620 steel
• Bolt Material: 9310 case-hardened steel
• Cam Pin: Hardened 4340 steel
• Firing Pin: Mil-Spec 8740 steel
• Compatibility: AR-15 5.56/.223/300 Blackout