Unity Tactical Optics Riser Platform FDE. A 2.26 optical centerline height provides faster/easier reticle acquisition while wearing electronic earpro/communications headsets night vision goggles and gas masks and allows for more rapid visual processing of the battlefield by promoting a heads-up posture. A heads-up posture also helps users maintain a neutral spine position which is more comfortable while wearing helmets plate carriers and other heavy gear. 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. FAST Riser 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. Technically the FAST Riser will support absolute cowitness optics such as EOTech XPS Sig Sauer Romeo8H etc. But compatibility with the FAST FTC Magnifier Mount will be limited. The FAST Riser comes standard with a rail-grabber clamp. A Flip-Up Offset Backup Rear Iron Sight module can be purchased separately. This feature will provide fast-transition BUIS capability to the FAST Riser. The Offset Rear Iron Sight Module is 100percent compatible with existing Offset Front Sights such as those available from MAGPUL Dueck Defense Midwest Industries and Knights Armament Company. The FAST Riser is built from 7075-T6 Aluminum and Type III Hardcoat Anodized Black or FDE. Due to the chemical process that takes place during Type III Hardcoat the final finish can vary slightly from part to part (even parts done in the same batch). Therefore your FDE FAST Mount may vary from one to the next and may vary slightly from the photos shown online. Specifications for Unity Tactical Optics Riser Platform: Manufacturer: Unity Tactical Finish: Type III Hardcoat Anodized Fabric/Material: T6 Aluminum Red Dot Sights-Footprint: Not Applicable Attachment Type: Picatinny Optic Cut: Not Applicable Length: 2 in Width: 1.3 in Height: 2 in Weight: 0.2 lb Mount Type: Picatinny Features of Unity Tactical Optics Riser Platform Accepts EOTech EXPS models Vortex UH-1 models Leupold LCO models and other rail-mounted-style sights Direct Mount to Picatinny Rail 7075 T6 Aluminum Construction Type III Hardcoat Anodized 2.26 to Centerline of Optic (as long as optic is lower 1/3 cowitness height) Package Contents: Unity Tactical Optics Riser Platform Unity Tactical FST-ORF: Optics Riser Platform FDE