DescriptionThis is a set of dual system guide rail slot. Items Included, a 3-slot M-LOK/KeyMod rail, a 7-slot M-LOK/KeyMod rail, a 11-slot M-LOK/KeyMod rail, M-LOK T-Nuts and screws, KeyMod nuts and screws and allen wrench. Prefessional kit for your use.Features-Color: Black_x000D_-Material: Alloy_x000D_-Size: About 15.5x6.5x1.5cm_x000D_- Perfect M-LOK / KeyMod rail section includes 3-slot, 7-slot, 11-slot Rails_x000D_- Hollow Design, Precision manufactured, sturdy and durable_x000D_- Precision machined out of premium alloy black_x000D_- Compatible with any standard M-LOK/Keymod system and picatinny rail accessories mounting_x000D_- Allows you add on any standard 1913 picatinny accessories_x000D_- 3-slot rail is compatible with sling mount adapter and QD Sling Swivel Adapter (Not included)_x000D_- Compatible with belt buckle interface. Easy to installPacking list: 1 x 3-slot M-LOK/KeyMod Rail_x000D_1 x 7-slot M-LOK/KeyMod Rail_x000D_1 x 11-slot M-LOK/KeyMod Rail_x000D_1 x M-LOK T-Nuts and Screws_x000D_1 x KeyMod Nuts and Screws_x000D_1 x Allen Wrench