CMMG AR-15 Mil-Spec Buffer Tube Kit, Receiver Kit

When you are thinking about building a new AR-15 rifle or completing that lower you have had sitting around" this CMMG AR-15 Carbine Receiver Extension Kit" 6-position Mil-Spec" is the perfect one. This kit contains an AR-15 rifle receiver extension" end plate" carbine buffer and spring. Designed to work with both standard 5.56mm NATO AR rifle builds.