The Trijicon RMR/SRO 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 RMR. This lightweight Full Co-Witness mount is perfect for mounting the RMR or SRO on any rifle platform with a Picatinny rail. The AC32074 provides a Full Co-Witness with backup iron sights. This means that the RMR/SRO 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.