Magpul MOE L4 RAIL PICATINNY POLYMER BLACK 4'' MAG408-BLK

Bolt-on MIL-STD 1913 rails give your MOE handguard plenty of accessory mounting versatility. Available in four lengths, so you can position just enough rail area exactly where you need it for each accessory. Clamps easily to the slots in the handguard with the included steel mounting hardware. Also fits many standard plastic handguards with proper center-to-center (c-to-c) hole spacing.