The M&P® Customizable Lower Parts Kit is the perfect choice for building your own AR-15. This kit provides all the minor parts generally used in an AR-15 build but allows the flexibility to add popular common aftermarket upgrades.
The kit includes a bolt catch, plunger, roll pin and spring; buffer retainer and spring; hammer pin; magazine catch, button, and spring; pivot pin, pin detent and pin detent spring; selector detent and spring; takedown pin, pin detent, and pin detent spring and trigger pin.
