Start off your AR15 build the right way by getting a high quality M&P AR-15 Complete Lower Parts Kit from Smith & Wesson! This LPK has everything you need to assemble your lower receiver except the stock assembly. Precision machining and production with superb materials specifications and standards ensures the highest quality product. The Smith & Wesson M&P AR-15 Complete Lower Parts Kit is everything you need in an LPK from a name you know you can trust!