M-16 lower Parts kit includes everything that goes inside your M16 lower receiver. Includes M16 fire control group, the pins and springs for the fire control group, M16 Seer, seer spring, and seer pin, bolt catch assy., mag catch assy., front pivot pin, rear takedown pin, 2 takedown pin springs, 2 takedown pin detents, A-2 pistol grip, pistol grip screw, pistol grip screw washer, buffer detent, and buffer detent spring. These are for replacement only of a registered full auto M16
