Mil-Spec Carbine Buffer Tube Receiver Extension Kit 6 Position

The AR Receiver Extension Kit is constructed from aircraft grade aluminum with rolled threading. The buffer tube has been hard coat anodized for maximum corrosion and wear resistance. A standard buffer spring and 3oz carbine buffer are included as well as a castle nut and lower receiver end plate. This assembly kit will fit on all Mil-Spec AR-15 lower receivers. Mil-Spec Carbine Buffer Tube / Receiver Extension 6 Position Aircraft Grade Aluminum Carbine Buffer Spring Castle Nut/Receiver Nut Mil-Spec Receiver End Plate Carbine Recoil Buffer