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.
- GM 6061 T6 MIL-SPEC Aluminum tube
- GM Mil-Spec Castle nut
- GM Mil-Spec end plate
- GM Mil-Spec Carbine buffer spring
- GM Mil-Spec Carbine buffer