Incorporating the Magpul M-LOK™ system. The M-LOK system allows rifle owners to easily customize their rifle by adding accessories without removing the handguard. M&P15-22 SPORT owners have the option of easily mounting Picatinny-style rail sections designed to accommodate other accessories. 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.