COMPLETE KIT: Pair this with one of KAK's buffer assembly kits and you have everything needed to build a complete lower receiver! One hundred percent American made. This kit comes with an A2 pistol grip, billet trigger guard, fire control group, bolt catch, magazine release, and every spring, detent, pin and miscellaneous part needed to assemble your lower receiver. All parts made to mil-spec dimensions. PARTS KIT WITHOUT TRIGGER GUARD OR GRIP: KAK Industry's reliable AR-15 lower parts kit, except without a grip or trigger guard. Pair with the pistol grip and trigger guard of your choice to complete everything necessary to assemble your AR-15 lower receiver. One hu Mfg: Kak Industry Llc.