Unity Tactical FAST MRDS Mount. The Unity Tactical FAST MRDS Mount, in conjunction with the Optic Adapter Plates in the FAST Modular Accessory Suite, brings compatible micro red dot sights to the established FAST height of 2.26? To optical centerline. This includes micro red dot sights with any of the following footprints: RMR, DeltaPoint Pro, Acro, 509T, RMSc and Holosun K. It comes standard with a two cross bolt rail clamp, but is compatible with the FASTTQD (Quick Detach) Lever. With exception to the Leupold® DeltaPoint® Pro, it is also compatible for use with the line of FASTT FTC magnifier mounts. 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 2.26 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. NOTE: The FAST MRDS is NOT compatible with the FAST Optic Adapter Plate with an Aimpoint Micro footprint. 2.26 to Optical Centerline. All Optic Adapter Plates in the FAST Modular Accessory Suite EXCEPT for the plate with an Aimpoint Micro footprint. 2 Cross Bolt Rail Clamp. Dimensions (W x L x H). Type III Hardcoat Anodized.