This KeyMod system Rail Section is designed to mount directly to any standard KeyMod handguard. Manufactured by Midwest Industries, it provides a 5-slot, 2.1″ mounting point for any MIL-STD 1913 Picatinny mount accessory. It is precision CNC machined from 6061 aircraft grade aluminum and mil-spec hard coat Type III anodized black. Made in the U.S.A.