CMMG 55CA9BC Receiver Extension, Pistol

Made from aluminum with a sleek and durable matte black finish, the CMMG Pistol Receiver Extension (Buffer Tube) kit includes what you need to finish up your AR pistol lower. The ambidextrous sling...

Rifle length buffer tube AR-15/M4/ M16/LR-308 pattern. Made from black hard coat anodized aluminum, the CMMG A1 receiver extension (buffer tube) is designed to accept fixed rifle length stocks and is...

Mil-Spec 6-position adjustable Carbine Receiver Extension (buffer tube). Made from aluminum with a matte black hard coat anodized finish, accepts mil-spec pattern carbine length buttstocks or pistol...

M4 / AR Castle Nut, Receiver Extension (Buffer Tube) castle nut. Matte black finish.

CMMG 6-Position adjustable Mil-Spec Receiver Extension (Buffer Tube) kit includes everything needed to complete your AR's buffer system. Just add the mil-spec diameter carbine stock or brace of your...