Smith & Wesson M&P15-22, Semi-automatic, AR, 22LR, 16.5 Barrel, Black, Fixed Stock, 10 M&P Slim Handguard with Magpul M-LOK, 10Rd, Magpul Flip Up Rear Sight 10207 The 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. Additional features include MBUS flip-up sights and a fixed stock. The gun comes with a bare muzzle and 10-round magazine to make it legal for sale in CT, MD and NJ.