Trijicon MRO Full Co-Witness Mount w/ Trijicon Q-LOC Technology Black. Return to Zero features in a low weight low profile design which works with any Picatinny rail.This means that the MRO is mounted at the same height as the iron sights. The optic's aiming dot will apear at the top of the iron sight post. This mount is typically used with flip up iron sights. Distance From Top of Mounting Rail to Optical Axis: 1.53 in. NOTE: Torque Spec (to rail): Spring Tension Only: 12-16 in. / lbs. Can be Tightened To: 44-66 in. / lbs. Specifications for Trijicon MRO Full Co-Witness Mount w/ Trijicon Q-LOC Technology: Manufacturer: Trijicon Color: Black Fabric/Material: 6061-T6 Aluminum Red Dot Sights-Footprint: MRO Optic Cut: Not Applicable Length: 1.8 in Width: 1.7 in Condition: New Included Accessories: 1x Installation Booklet 1x Mount 1x Hex Key 4x Screws Last Chance: Yes QUICK-RELEASE RETURN-TO-ZERO Multiple proprietary recoil lugs ensure total rail engagement. Easily remove and re-attach without needing to confirm zero. AUTOMATIC RETENTION KEEPS OPTIC SECURE Heavy-duty springs ensure secure retention under heavy repeated recoil. Facilitates one-handed mounting. SNAG-RESISTANT KNOB DESIGN Compact circular design minimizes hazards of gear snags. PRECISION-CUT DIMENSIONS Ensures optimal placement on MIL-STD 1913 NATO non-mil spec and even damaged rails. PROVEN DURABILITY Machined from 6061 aluminum for outstanding repeatable performance. Package Contents: Trijicon MRO Full Co-Witness Mount w/ Trijicon Q-LOC Technology 1 - Mount 4 - Screws 1 - Hex Key 1 - Installation Booklet Trijicon AC32070: MRO Full Co-Witness Mount w/ Q-LOC Technology Black