U.S.A.Made lower parts kit includes the following: tacfire pgar-b-usa pistol grip (black), pistol grip screw, pistol grip lock washer, trigger, trigger pin, trigger spring, trigger guard, hammer, hammer spring, hammer pin, bolt catch roll pin, bolt catch spring, detent spring, bolt catch buffer, take down detent, bolt catch, magazine catch spring, magazine catch button, magazine catch, front pivot pin, detent selector, take down pin, buffer retainer pin, buffer retainer spring, disconnector spring, disconnector, selector, selector spring