The KE Arms AR-15 GI Parts Kit has every part you need to assemble your bare lower receiver into a functional piece for your custom AR-15 or M4 build. All parts Made in USA! Now available with the Brownells AR-15 Collapsible Stock Assembly. The AR-15 collapsible buttstock similar to the current US GI M4 carbine stock provides convenient six-position length-of-pull adjustment to fit different-size shooters, including those wearing body armor. Ready to install on any standard AR-15 rifle or carbine lower receiver; includes buffer tube, receiver lock plate, lock nut, toe-mounted steel sling loop, carbine recoil spring and buffer. Buttstock is made from extremely tough, fiberglass-reinfor Mfg: Brownells