Burris XTR Signiture 30mm Rings

XTR Signature series Rings, Pair, Matte Black - 30mm and available in 1", 1.25", and 1.5" heights. Signature Rings were designed for the tactical shooter. They deliver plenty of holding power, with less weight. Features:- Unique, self-centering, dual steel clamps with full cross-through connection assure proper center on any width Picatinny rail, while adding extra strength- Revolutionary Pos-Align Inserts technology, in a tactical ring configuration- Pos-Align Inserts guarantee perfect centering and maximum scope-to-ring contact for tremendous gripping power without damaging the scope finish- Lets you virtually sight in your gun without moving the scope adjustments- Corrects misalignment caused by off-center receiver holes- Corrects for bases or rings being slightly off-center- No need for expensive tapered bases or shimming for thousand-yard shooting- Rugged, robust aluminum tactical rings save weight and mount on any Weaver or Picatinny-style rail- Each ring set includes two sets of concentric inserts and one set each of the following offset inserts: +/-5 MOA, +/-10 MOA, +/-20 MOA Specifications:- Material: Aluminum