Check the listing for details. 3 PCS M-Lok Picatinny Weaver Rail Section Aluminum 3 5 11 Slot 1.5" 2.5" 5". Condition: New. Listed at 12.49 USD. Accessory rail sections, for M-Lok spec. handguards Features ---Ideal for attaching lights, laser, optics, bipods, and foregrips ---Lightweight, made of aluminum with black anodized matte finish Mounting screws and tools included ---Includes three sizes: ---1.5" with 3 slots ---2.5" with 5 slots ---5" with 11 slots Specifications ---Dimensions ---5" (length) x 11mm (height) x 21mm (width) ---2.35" (length) x 11mm (height) x 21mm (width) ---1.57" (length) x 11mm (height) x 21mm (width) ---Material: Aluminum ---Weight: 1.0 oz/ 1.5 oz/ 2.0 oz each ---Finish: Black Matte Items Included ---One (1) 3 Slot M-LOK Rail ---One (1) 5 Slot M-LOK Rail ---One (1) 11 Slot M-LOK Rail ---Mounting screws ---Allen wrenches.Accessory rail sections, for M-Lok spec. handguards Features ---Ideal for attaching lights, laser, optics, bipods, and foregrips ---Lightweight, made of aluminum with black anodized matte finish Mounting screws and tools included ---Includes three sizes: ---1.5" with 3 slots ---2.5" with 5 slots ---5" with 11 slots Specifications ---Dimensions ---5" (length) x 11mm (height) x 21mm (width) ---2.35" (length) x 11mm (height) x 21mm (width) ---1.57" (length) x 11mm (height) x 21mm (width) ---Material: Aluminum ---Weight: 1.0 oz/ 1.5 oz/ 2.0 oz each ---Finish: Black Matte Items Included ---One (1) 3 Slot M-LOK Rail ---One (1) 5 Slot M-LOK Rail ---One (1) 11 Slot M-LOK Rail ---Mounting screws ---Allen wrenches.