The M&P Accessories AR-15 Lower Parts Kit (brand part no. 1085634) includes everything needed to build a complete AR-15 lower receiver in one package: bolt catch, plunger, roll pin and catch spring; buffer retainer and spring; disconnector and spring; hammer, pin, and spring; magazine catch, button, and spring; pistol grip with lock washer and screw; pivot pin with detent and spring; selector with detent and spring; takedown pin with detent and spring; and a trigger, trigger guard, guard roll pin, and trigger pin/spring. Backed by M&P Accessories’s M&P accessories line, this is a genuinely complete kit rather than a partial parts bundle, making it a solid single-source option for a full lower build.

Key Specifications

• Includes the bolt catch, plunger, roll pin, and catch spring assembly.
• Includes the buffer retainer and spring.
• Includes the disconnector, hammer, and trigger with associated pins and springs.
• Includes a pistol grip with lock washer and grip screw.
• Includes the selector and takedown pin assemblies with detents and springs.
• Finished in black to match standard AR-15 hardware.
• Ships as a complete small-parts kit rather than individual loose pieces, reducing the chance of a missing part mid-build.
• M&P Accessories backs this kit with Smith & Wesson’s manufacturing standards.

Frequently Asked Questions

Is this a complete lower parts kit? Yes, it includes everything needed to build a complete AR-15 lower receiver, including a pistol grip.

Does this include a trigger? Yes, a full trigger, trigger guard, and associated hardware are included.

Buy the M&P Accessories AR-15 Lower Parts Kit

Complete your AR-15 lower in one order with a kit backed by M&P Accessories. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and browse our full AR lower parts kit selection.