The M-LOK mounting system allows you to attach just about anything to your rail system without having to remove the rail itself. It's universal, and it makes it possible for you to mount only what you need, and exactly where you need it. Includes: 1 - CMC M-LOK(R) QD Sling Mount 1 - CMC M-LOK(R) 3 Slot Picatinny Rail 1 - CMC M-LOK(R) 5 Slot Picatinny Rail 1 - CMC M-LOK(R) 7 Slot Picatinny Rail Features: Mounts to all M-LOK compatible handguards and forends QD Sling Mount accepts any push-button QD swivel Machined from Mil-Spec anodized aluminum for durability and lightweight Beveled edges reduce snagging Anti-rotation design prevents swivels from spinning Mounting hardware included