Unity Tactical FAST™ is a series of optic mounts that provide end users with a 2.26" centerline optic height. This optic height 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.Built from 6000 series Aluminum Alloy with black anodized, the PTS Unity Tactical FAST™ Riser securely elevates block-type red dot optics with a standard lower 1/3 cowitness picatinny mount to a 2.26″ optical center line.It provides an elevated M1913 Picatinny platform for direct attachment of optics such as EOTech EXPS®, Leupold LCO®, Vortex UH-1®, and other "lower 1/3" optics*It comes standard with a two cross bolt rail clamp but is compatible with the FAST™QD (Quick Detach) Lever (Sold Separately).Features: Comes standard with a rail-grabber clamp Fully licensed Unity Tactical trademarksSpecification:* Color - Black* Material - CNC machined 6000 series Aluminum Alloy* Coating - Black Anodized Finish* Weight - 68g (approx.)* Dimension - 90 x 31 x 23.7mm* Compatible with "lower 1/3" cowitness picatinny mount red dot optics