Trijicon RMR Co-Witness Quick Release Picatinny Mount Aluminum Anodized Matte Black Designed specifically for the Trijicon RMR. This lightweight Full Co-Witness mount is perfect for mounting the RMR on any rifle platform with a Picatinny rail. The AC32074 provides a Full Co-Witness with backup iron sights. This means that the RMR is mounted at the same height as the iron sights. The optic's aiming dot will appear at the top of the iron sight post. This mount is typically used with flip up iron sights. Specifications and Features: Trijicon RMR Quick Release Mount Full Co-Witness Compatible with Picatinny rails Mounting screws included 1.8" Length 1.384" Height (top of rail to optical axis) 2.2 oz 7075-T6 Aluminum Anodized Matte Black Fits: All Trijicon RMR models