CMMG A1-style receiver extension for AR-platform rifles. Direct replacement component engineered for reliable performance and proper fit with standard buffer tubes and stocks.
The CMMG Receiver Extension A1 is a precision-engineered component designed for AR-platform rifle builders and gunsmiths who demand reliability and proper fit.
This receiver extension serves as the foundation for your rifle's stock assembly and buffer system. Whether you're building a new rifle or replacing a worn component, CMMG's engineering ensures your system functions as intended.
The A1 profile remains a proven design choice for shooters who value simplicity and reliability. This component integrates seamlessly into both retro builds and modern tactical configurations.