Designed specifically for the Trijicon RMR. This lightweight lower 1/3 cowitness mount is perfect for mounting the RMR on any rifle platform with a Picatinny rail. The AC32059 provides a lower 1/3 cowitness with backup iron sights. This means that the RMR is mounted higher than the iron sights so that it provides a less cluttered field of view. The iron sights are then in the lower 1/3 of your optical window for backup.