CMMG Fastback Mil-Spec AR-15, LR-308 Buffer Tube Aluminum Black

The CMMG Fastback Receiver Extension allows you to deploy your favorite stock (or brace) faster than ever. The Fastback Receiver Extension attaches to any firearm that accepts a Mil-Spec receiver extension (buffer tube). Once installed, this allows you to easily pull the stock (or brace) back to an extended position, without pressing a release button. Fastback Technology is a Patent Pending feature on certain receiver extensions that makes the RipStock and RipBrace instantly deployable and allow