Magpul M-LOK Polymer Rail Section 5 Slot For M-LOK Compatible Systems This 5 Slot Polymer rail will facilitate mounting Picatinny rail furniture to M-LOK Platforms Designed for use with all M-LOK compatible Hand Guards and Forends, our M-LOK® Aluminum Rail Sections (5 Slots) allow the attachment of various 1913 Picatinny spec rail-mounted accessories such as lights, vertical grips, etc. Machined from Mil-Spec-anodized aluminum, M-LOK Rail Sections also feature beveled ends to reduce snagging and eliminate sharp corners and edges. All hardware necessary for attachment directly to M-LOK Slots on either aluminum or polymer hand guards and forends is included. 5 Slots, max overall length of 2.5". Made in U.S.A.