This is a CMMG Buffer Tube Complete Assembly known as the AR-15, model 55CA6C7.
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.
Features:
Designed to work with both standard 5.556mm NATO AR rifle builds
High quality anodized aluminum
