The Magpul M-LOK Aluminum Rail Section 3 Slot is designed for use with M-LOK compatible Hand Guards and Forends. The Rail Section will allow the attachment of 1913 Picatinny rail mounted accessories such as lights, vertical grips, etc. Machined from milspec-anodized aluminum. The M-LOK Rail Sections also feature beveled ends to reduce snagging and eliminate sharp corners and edges found on some rails. All hardware for attachment directly to M-LOK Slots on either aluminum or polymer hand guards and forends is included. 3 Slots, max overall length of 1.6". Made in U.S.A.