Designed to fit on the barrel of the full size AK47 and AK47S series rifles (not for AK Spetsnaz - may fit others with modification).  This allows mosts guns to keep the front sight in-tact and still add one bottom rail and two side rails.  Attaches easily, with an allen wrench, in minutes - You may have to remove the bottom-mounted cleaning rod.  This rail system looks mean and is perfect for adding a vertical foregrip, lasers or flashlights.