Smith & Wesson M&P 15-22 Sport RifleThe M&P15-22 SPORT features a 10-inch M&P slim handguard that incorporates the popular Magpul M-LOK™ system. The M-LOK system allows rifle owners to easily customize their M&P15-22 SPORT by adding accessories without removing the handguard. M&P15-22 SPORT owners have the option of easily mounting numerous M-LOK-compatible accessories or any number of Picatinny-style rail sections designed to accommodate other accessories. Smith & Wesson includes a 2-inch M-LOK rail panel with each rifle.The M&P15-22 SPORT comes standard with one of the most popular folding sights systems available for MSRs. The removable Magpul MBUS® front and rear folding sights are lightweight and durable, further enhancing the performance and value of the new M&P15-22 SPORT