Burris 420221 XTR Signature Rings Matte Black 30mm UPC: 000381202215

XTR Signature Rings were designed for the tactical shooter. They deliver plenty of holding power, with less weight.br /br /Features:br /br /- Unique, self-centering, dual steel clamps with full cross-through connection assure proper center on any width Picatinny rail, while adding extra strengthbr /- Revolutionary Pos-Align Inserts technology, in a tactical ring configurationbr /- Pos-Align Inserts guarantee perfect centering and maximum scope-to-ring contact for tremendous gripping power without damaging the scope finishbr /- Lets you virtually sight in your gun without moving the scope adjustmentsbr /- Corrects misalignment caused by off-center receiver holesbr /- Corrects for bases or rings being slightly off-centerbr /- No need for expensive tapered bases or shimming for thousand-yard shootingbr /- Rugged, robust aluminum tactical rings save weight and mount on any Weaver or Picatinny-style railbr /- Each ring set includes two sets of concentric inserts and one set each of the following offset inserts: +/-5 MOA, +/-10 MOA, +/-20 MOAbr /br /Specifications:br /br /- Height: 1.00 in.br /- Size: 30 mmbr /- Material: Aluminum