TacFire's 9mm AR pistol build kit with LPK includes: 9mm 4.5" barrel (USA made); 9mm bolt carrier group; Mil-Spec upper receiver (USA made); 4" Slim free-float KeyMod handguard; complete lower parts kits (USA made); standard receiver end plate; Mil-Spec/Commercial castle nut; Mil-Spec pistol buffer tube with foam cover; heavy buffer; buffer tube spring; Mil-Spec charging handle; dust cover; forward assist; 1/2"-36 thread sound and flash forwarder brake.