Six-position mil-spec carbine buffer tube kit with a 3 oz carbine buffer, action spring, castle nut, and QD receiver end plate in the box.
CMC's Enhanced QD carbine kit (MPN 81626) holds every part needed to mount a collapsible stock on an AR-15 lower: a six-position mil-spec-diameter carbine buffer tube, a 3 oz carbine buffer, an action spring, a high-carbon steel castle nut, and a receiver end plate with a QD sling socket. The tube has a drain hole, and the kit is made in the USA.
Add the CMC AR-15 Carbine Buffer Tube Kit, Mil-Spec, Enhanced QD to your build and see how it enhances your platform.