CMMG M16 Bolt Carrier Group — 5.56/.223 Compatible

Description

The CMMG M16 Bolt Carrier Group is a complete Mil‑Spec assembly intended for AR-15 platforms chambered in 5.56/.223 and 300 BLK. Key components are built from high-grade steels and finished to resist wear and corrosion during routine use. The carrier is chrome-lined and phosphate finished for durability, while the bolt and extractor use heat-treated steels with phosphate finishes for reliable function. This unit is supplied as a complete BCG for standard M16/AR-15 configurations and is covered by CMMG’s Lifetime Quality Guarantee.

Key Specifications

• The bolt is made from 9310 steel with a phosphate finish.
• The carrier is constructed from 8620 steel, chrome-lined with a phosphate finish.
• The extractor is manufactured from 4140 steel with a phosphate finish.
• Compatible with 5.56/.223 and 300 BLK chamberings.
• Finish is black matte.
• Overall dimensions are 1.90 x 1.90 x 9.25 inches.
• Listed length is 9.2500 inches.
• Width and height are each 1.9000 inches.
• Designed as a complete Mil‑Spec M16 bolt carrier group for AR-15 platforms.

Whether you’re building or maintaining an AR-15, this CMMG M16 BCG delivers industry-standard dimensions and durable steel components to support consistent, serviceable operation. The combination of chrome-lined carrier surfaces and phosphate-treated parts helps manage wear and eases maintenance, making it a practical choice for range use and general-purpose AR-15 assemblies.