RifleSupply Polymer Rail Section Kit for MOE Handguard L2 L3 L4 L5 Sizes Injection molded from a proprietary reinforced composite for enhanced strength and durability while remaining lightweight, Rail Sections also feature beveled ends to reduce snagging and eliminate sharp corners and edges. Designed for use with MOE Hand Guards and For ends, the MOE Polymer Rail Sections allow the attachment of various 1913 Picatinny spec rail-mounted accessories such as lights, vertical grips, etc. Available in four lengths, so you can position just enough rail area exactly where you need it for each accessory.