The GG&G "Dually" dual rail accessory mount fits standard AR-15 A frame front sights. It provides two mil-spec 1913 picatinny rails, one on each side of the front sight. The length of the rails is 2 1/8 inches. The dual rails allow many possibilities, they will accept flashlight mounting rings, picatinny sling mounts, lasers, or any accessory that mounts to picatinny rails. The dually is made from 6061 T6 solid aluminum alloy. The tactical light mount is Type III hard-coat anodized matte black to provide a mil-spec combat proven finish. Easy to mount with included allen wrench, the sight is attached with two allen head screws.