Magpul Industries Polymer Picitanny Rail for M-LOK Compatible Systems, 5-Slot Designed for Use with all M-LOK compatible hand Guards and forends Allows the attachment of various 1913 Picatinny spec rail-mounted accessories such as lights, vertical grips, etc Injection molded from a proprietary reinforced composite for enhanced strength and durability while remaining lightweight Beveled ends 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