IMI Defense 9 Notch M-LOK Rail Section Polymer Black. 74 in Features of IMI Defense 9 Notch M-LOK Rail Section Made from high quality temperature resistant polymer compound Captive Allen mounting screws Tight fit profile alignment stud for solid attachment and recoil absorption Mil-Spec 1913 Picatinny rail profile Compatible with M-LOK Package Contents: IMI Defense 9 Notch M-LOK Rail Section IMI Defense 14490: 9 Notch M-LOK Rail Section Polymer Black