Compatible with all M-LOK handguards and forends these rail sections allow you to attach 1913 Picatinny rail-mounted accessories to your weapon. Rail sections are available in either aluminum or polymer. Aluminum sections are machined from Mil-Spec anodized aluminum. Lightweight polymer sections are injection molded from a proprietary reinforced composite for enhanced strength and durability. Both aluminum and polymer rail sections feature beveled ends to eliminate sharp corners and edges plus reduce snagging.