The FAST FTC Holosun magnifier mount uses a force-to-overcome mechanism, stowing the magnifier below the optical sight plane and within the footprint of the weapon's receiver when not in use. UNITY's FTC (flip-to-center) technology cancels the flip-to-side placement of legacy products, eliminating snag hazards and occlusion of sight pictures when stowed. The FAST FTC Holosun was designed for the Holosun HM3X and HM3XT Magnifier and comes standard with a low-profile integrated FAST QD Lever. Features : 7075-T6 Aluminum Construction "2.26" to Optical Centerline" Type III Hardcoat Anodized Finish Integrated FAST QD Lever