Trijicon RMR Carry Handle Mount Black. 528in SRO Dot is centered in field of view 0.769in Height over bore to optical axis: RMR: 3.524in SRO: 3.765in Specifications for Trijicon RMR Carry Handle Mount: Manufacturer: Trijicon Color: Black Finish: Matte Gun Model: M16 AR-15 Fabric/Material: Metal Fit: All Trijicon RMR's not included Red Dot Sights-Footprint: RMR Optic Cut: Not Applicable Length: 1.63 in Weight: 1.3 oz Package Contents: Trijicon RMR Carry Handle Mount 1 Mount 1 Screw/Washer Set 2 Optic Mounting screws 1 Hex Wrench Trijicon AC32060: RMR Carry Handle Mount Black