MRO Quick Release Full Co-Witness MountIncludes: 1 mount 4 screws 1 hex key The Trijicon MRO Full Co Witness Quick Release mount features a Mil Spec drop test rated 7075 T6 aluminum design, with a easy to use one handed tool less mounting. 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