Just finished up my first complete build-Preban lower, rise armament folds of honor trigger, anderson lower parts kit, tyrant designs aluminum grip, fab defense stock , wmd buffer tube, spikes heavy buffer, wmd billet upper, cryptic coatings bcg, oil slick barrel, oil slick gas block and oil slick muzzle device, Odin works o2 lite handguard, Odin works mag release, radiant weapons charge handle, titanium pins and battle arms development enhanced bolt catch