Designed to fit on the barrel of the M4, M15, M16 series rifles (may fit others with modification).  This allow 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 - NO modification of your gun is required.  This rail system looks mean and is perfect for adding a vertical foregrip, lasers or flashlights.

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