The Magpul MAG581 M-LOK Aluminum Accessory Rail 5-Slot is designed to fit all M-LOK compatible hand guards and forends, offering a reliable way to mount 1913 Picatinny spec accessories such as lights and vertical grips. Injection molded from a proprietary reinforced composite, this rail section combines enhanced strength and durability with a lightweight design. It features beveled ends to reduce snagging and remove sharp edges for a cleaner profile. Measuring 2.5 inches in overall length with 5 slots, it comes with all the necessary hardware for straightforward attachment to M-LOK slots on both aluminum and polymer hand guards. Proudly made in the U.S.A.