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Trijicon's Full Co-Witness Mount Adapter is used to mount a MRO reflex sight to a flat Picatinny rail on rifles, carbines, and shotguns. This model is designed to set the sight's optical axis 1.538" above the rail for a full co-witness with the front iron sights..
In the Box
Trijicon Full Co-Witness Mount Adapter for MRO Sight