There are two common issues when mounting scopes to AR-style platforms - getting the right scope height and the eye relief. The Leupold Mark AR family of mounts solves both these problems while providing the most rock-solid mounting solution in the business. Combine that with ease of a one piece mount and you have the perfect match to that precision Leupold scope. Space between rings is 3.46".FeaturesHeight to center of tube is 1.4"