This handy Picatinny-style accessory rail is constructed from CNC machined 6061 anodized aluminum, and makes use of the often forgotten bayonet lug under an AR-15's front sight. The useful 3-1/2" length of rail creates a perfect mounting platform for attaching vertical grips or lights/lasers. It allows the original sling swivel to be used, and offers the option of adding new sling attachment systems. Installation is simple, requiring a single pin to hold the rail securely in place.