Unity Tactical FAST Holosun AEMS Mount Anodized Black. 26in optical centerline from the rail. It comes standard with a two cross bolt rail clamp but is compatible with the FAST QD (Quick Detach) Lever. It can be paired with any FAST FTC (Flip-to-Center) magnifier mount. FAST is a series of optic mounting solutions that provides end users with a quicker sight picture than standard height mounts. FAST mounts create a 2.26in optical centerline from the rail which allows for more rapid visual processing of the battlefield by ensuring an ergonomically correct heads-up posture. Further they provide faster and easier dot/reticle acquisition while wearing night vision goggles protective masks plate carriers and other gear. MOUNT TYPE 2 Cross Bolt Rail Clamp FAST QD Lever Compatible (Sold Separately) Specifications for Unity Tactical FAST Holosun AEMS Mount: Manufacturer: Unity Tactical Finish: Anodized Fabric/Material: 7075-T6 Aluminum Optic Cut: Holosun AEMS Height: 2.26 in Weight: 4 oz Quantity: 1 Package Contents: Unity Tactical FAST Holosun AEMS Mount