The CMMG Bolt Carrier Group M16 is a complete Mil‑Spec assembly built for AR-15 pattern rifles chambered in 5.56/.223 and .300 BLK. Critical components are specified by material and finish to meet service-grade durability: the bolt is 9310 steel with a phosphate finish, the carrier is 8620 steel with a chrome-lined, phosphate finish, and the extractor is 4140 steel with a phosphate finish. The assembly is supplied in a black matte finish and intended as a direct-fit Mil‑Spec replacement for M16-style bolt carrier groups.
Key Specifications
- This is a complete Mil-Spec M16 bolt carrier group.
- Bolt material is 9310 steel with a phosphate finish.
- Carrier material is 8620 steel with a chrome-lined, phosphate finish.
- Extractor material is 4140 steel with a phosphate finish.
- Finish style is black matte.
- Primary construction material is steel.
- Designed for chamberings 5.56mm/.223 and .300 BLK.
- Compatible with AR-15 pattern platforms.
The CMMG M16 BCG pairs proven materials and Mil‑Spec finishes to deliver a straightforward, service-oriented bolt carrier group suitable for range, duty, and general-purpose AR-15 use. Its chrome-lined carrier and specified steels emphasize corrosion resistance and long-term durability without unnecessary complexity. For those seeking an OEM-style replacement or like-for-like mil-spec assembly for 5.56/.223 and .300 BLK platforms, this BCG provides clear, spec-driven construction that fits standard M16/AR-15 systems.
This description was generated with AI and may contain errors. Verify specifications and legal restrictions with the manufacturer before purchase. Provided “as-is” without warranties or guarantees.
