Mount Picatinny Rail Accessories Onto M-LOK Handgaurds 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. Includes all necessary hardware for attaching rails to M-LOK slots on aluminum or polymer handguards and forends. SPECS Aluminum, matte black 3 Slots – 1-1/2" (3.8cm) OAL 5 Slots – 2-3/8" (6cm) OAL 7 Slots – 3-1/8" (7.9cm) OAL 9 Slots – 3-7/8" (9.8cm) OAL