Build a dependable, precision-focused AR-15 with the CMMG Bolt Carrier Group for 6.5 Grendel and 6mm ARC. Designed for these high-performance cartridges, this complete BCG supports consistent cycling and reliable operation in long-range, hunting, and competition rifle builds.
Machined for durability and finished in black nitride, this CMMG AR-15 BCG combines a heat-treated 9310 steel bolt with a full-auto-rated M16-profile carrier. The finish helps resist corrosion, reduce friction, and support smooth cycling, while the properly staked gas key is built for secure, dependable service.
- Caliber compatibility: 6.5 Grendel Gen 2 (Type II) and 6mm ARC.
- High-strength 9310 steel bolt is heat-treated and magnetic particle inspected (MPI).
- Durable black nitride finish helps resist corrosion and reduce friction.
- Full-auto-rated M16-profile carrier provides increased mass for reliable performance.
- Properly staked gas key supports secure, long-term operation.
- Complete assembly includes bolt, carrier, cam pin, firing pin, and retaining pin.
- Designed for AR-15 builds using compatible 6.5 Grendel or 6mm ARC components.
Choose the CMMG AR-15 BCG for 6.5 Grendel and 6mm ARC when your build calls for purpose-designed components, durable construction, and reliable function. Pair it with a compatible upper receiver and parts to complete a rifle setup suited to precision shooting, field use, or range sessions. CMMG’s attention to fit and finish gives you a solid foundation for your next high-performance AR-15 build.
