The Trijicon RMRcc Full Co-Witness Quick Release Mount with Trijicon Q-LOC Technology features a Mil-Spec drop test rated 6061-T6 aluminum design, with an easy to use one handed tool less mounting system. This Return to Zero mount boasts a low weight and low profile design, compatible with any Picatinny rail. Designed specifically for the Trijicon RMRcc. this lightweight Full Co-Witness mount is perfect for mounting on any rifle platform with a Picatinny rail. The AC32112 provides a full Co-Witness with backup iron sights. This means the RMRcc 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.