IMI Defense 3 Notch M-LOK Rail Section Aluminum Black. Specifications for IMI Defense 3 Notch M-LOK Rail Section: Manufacturer: IMI Defense Finish: Matte Gun Rail: M-LOK Gun Type: Rifle Gun Make: AR Platform Gun Model: AR-15 Length: 1.38 in Features of IMI Defense 3 Notch M-LOK Rail Section Precision machined from aircraft-grade billet aluminium Mil-spec matte black hard anodize coating 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 3 Notch M-LOK Rail Section IMI Defense 14439: 3 Notch M-LOK Rail Section Aluminum Black