Cmmg Receiver Extension A1

The CMMG Receiver Extension A1 is a rifle-length buffer tube engineered for AR-15 platform builds requiring mil-spec dimensions and proven reliability. Constructed from high-quality aluminum with a matte black finish, this component serves as the rearward extension housing for your direct impingement system, securing the buffer spring, buffer weight, and stock assembly in proper alignment.

The A1 profile represents the original carbine-length specification, making it compatible with mil-spec furniture and aftermarket components designed to AR-15 standards. At 0.25 lbs and measuring 11.5 inches in length, this aluminum tube provides the structural rigidity necessary for cycling reliability across standard and enhanced power ammunition loads. The matte black anodized finish resists corrosion during field use and maintains a professional appearance on both duty and range rifles.

This receiver extension suits operators building or maintaining AR-15 rifle platforms for patrol duty, training, competitive shooting, or tactical applications. Whether you're assembling a complete rifle from parts or replacing a worn tube, this CMMG component offers straightforward installation on any standard AR-15 lower receiver with existing fire control group and trigger assembly. Serious builders and gunsmiths value CMMG's dimensional consistency and finish quality, ensuring hassle-free stock fitment and repeatable performance across multiple builds.