CMMG 5.7x28mm Barrel and Bolt Carrier Group Kit for AR15 – 16.1 Inch Barrel, Black (57D0476)

• Barrel and bolt carrier group kit chambered in 5.7x28 millimeter caliber
• Includes 16.1 inch barrel and matching bolt carrier group assembly
• Designed for integration into AR platform upper receiver configurations
• Compatible with specific lower receivers or conversion magazine setups
• Supports use of radial delayed blowback operating system design
• Black finish components provide consistent appearance and corrosion resistance

The CMMG Barrel and BCG Kit 5.7x28mm 16.1″ AR Rifles Black is a barrel and bolt carrier group kit designed for AR-platform rifle builds chambered in 5.7x28mm. This kit includes a 16.1-inch barrel and a matching bolt carrier group configured for this caliber. It is designed to integrate with compatible AR-15 upper receiver assemblies.

The CMMG 5.7x28mm barrel and BCG kit includes a 16.1″ barrel and a dedicated bolt carrier group finished in black. It is compatible with AR rifle platforms and is intended for builds using appropriate lower receivers or conversion magazines. The kit supports integration into standard AR upper assemblies. This product is used for assembling rifle systems for range use or field setups. In standard configurations, the included components operate together to chamber and cycle 5.7x28mm cartridges.