parts for rifles, namely, firing pins, barrels, gas tubes, jet comps, flash hiders, bolts, and bolt carriers; lower parts packages for rifles comprised of an A2 grip, adjustable carbine buffer tube, carbine buffer spring, carbine mil-spec buffer, castle nut, locking plate, bolt catch, bolt catch detent, bolt catch roll pin, bolt catch spring, buffer retainer, buffer retainer spring, disconnector, disconnector spring, hammer, hammer pin, hammer spring, magazine catch, magazine catch button, magazine catch spring, pistol grip lock washer, pistol grip screw, pivot pin, pivot pin detent, pivot pin detent spring, selector, selector detent, selector detent spring, takedown pin, takedown pin detent, takedown pin detent spring, trigger, trigger guard, trigger guard roll pin, trigger pin, and trigger spring