Designed specifically for the Trijicon RMR. This lower 1/3 co-witness mount is perfect for mounting the RMR on any rifle platform with a Picatinny rail. The AC32062 provides a lower 1/3 co-witness 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. Package includes: - 1 mount - 2 RMR screws - 1 allen wrench. Features: - lower 1/3 co-witness - see through design (helps keep the mount lightweight and improves field of view) - compatible with any MIL-STD-1913 Picatinny rail - rugged aluminum design - easy-to-use Colt knobs (no tools needed). specifications: - fits: all Trijicon RMR models - length: 1.78 inch - weight: 3.44 oz. - finish: matte black anodized