Designed specifically for the trijicon rmr.This lightweight lower 1/3 co-witness mount is perfect for mounting the rmr/sro on any rifle platform with a picatinny rail.The ac32075 provides a lower 1/3 co-witness with backup iron sights.This means that the rmr/sro is mounted higher than the iron sights resulting in a clearer field of view.The iron sights remain visible in the lower 1/3 of your optical window for use as a backup.Length: 1.80"Type: Optic MountModel: RMR/SRO Quick Release Lower 1/3 Co-Witness MountFinish: 7075 AluminumMaterial: 6061-T6 AluminumPieces: 1Mount Type: Picatinny Rail/RMR/SRO Pattern FootprintMount Height: 1.511" RMR/1.752" SRO