Our trademarked Dual Dovetail system provides a classic low-profile mount for scopes on a variety of popular actions. Bases accept all Leupold rotary dovetail rings. Dovetail connections at both front and rear provide a rock-solid mounting platform. Silver Finish. 50mm Objectives will almost always use HIGH rings in a given style. In certain instances, such as with extremely heavy barrels or some makes of firearm, SUPER HIGH rings may be necessary.