FAST FTC Magnifier Mounts feature the first ever Flip-To-Center (FTC) mechanism (patent-pending), providing stowage completely within the footprint of the weapon's receiver while not occluding the host optic's sight picture at all. This provides the most optic capability with the lowest profile during all modes of operation. The revolutionary FTC function completely solves the problem posed by legacy flip-to-side magnifier mounts (when disengaged, the magnifier hangs off the side of the gun, creating a major snag hazard). FAST(TM) FTC Magnifier Mounts completely eliminate this danger and utilize a force-to-overcome mechanism for rapid transition. Des Mfg: Unity Tactical