Ncstar VMML3 M-LOK Picatinny 5 Slot Accessory rail. Mounts onto M-LOK handguards. Short rail covers 1½ M-LOK slots. Mounts with two screws and M-LOK compatible T-Nuts. 5 Slot Picatinny rail. Rounded profile rail ends for a more comfortable hold when used as a hand stop. Perfect for mounting Accessories with Weaver/ Picatinny mounts like flashlights and lasers to your M-LOK handguards. Black Anodized Aluminum Construction.