TacFire USA Made AR-15 Lower Parts Kit Complete lower parts kit One pistol grip screw One pistol grip lock washer One trigger, one trigger pin One trigger spring One trigger guard (flat) One hammer One hammer spring One hammer pin One bolt catch roll pin One bolt catch spring One detent spring One bolt catch plunger One take down detent One bolt catch One magazine catch spring One magazine catch button One magazine catch One front pivot pin One detent selector One take down pin