CMC Triggers Enhanced BCG 6mm ARC – Nitrided Black

The CMC Triggers Enhanced BCG is a precision-machined bolt carrier group designed specifically for 6mm ARC chambered AR-15 pattern rifles. This carrier group replaces factory BCGs with a component engineered for improved reliability and durability in the 6mm ARC platform, which operates at higher pressures than standard 5.56 NATO. Shooters upgrading to 6mm ARC or building a dedicated 6mm ARC upper will appreciate the proper headspace and gas key staking that CMC builds into this BCG.

Machined from 8620 steel with a nitrided black finish, this bolt carrier group offers superior wear resistance and corrosion protection compared to standard phosphate coatings. The salt bath nitriding process hardens the surface while maintaining dimensional stability. Installation is drop-in for any mil-spec AR-15 upper receiver chambered in 6mm ARC—no fitting or gunsmithing required. The carrier is properly staked and ready to run.

• Part Type: Bolt Carrier Group
• Compatible Firearms: AR-15 pattern rifles chambered in 6mm ARC
• Material: 8620 steel
• Finish: Salt bath nitrided black
• Installation: Drop-in
• Includes: Complete bolt carrier group (carrier, bolt, gas key, cam pin, firing pin, retaining pin)