M&P Accessories 1085634 AR Lower Parts Kit AR-15 Black

This AR-15 lower receiver kit includes everything needed to build a complete lower receiver. Included is a bolt catch plunger roll pin and catch spring; buffer retainer and spring; disconnecter and spring; hammer pin and spring; magazine catch button and spring; pistol grip grip lock washer and grip screw; pivot pin pin detent and pin detent spring; selector detent and detent spring; takedown pin pin detent and pin detent spring; trigger trigger guard guard roll pin and a trigger pin/spring.