Burris XTR Signature Rings were designed for the tactical shooter but work well on almost any rifle that has a Picatinny rail. They deliver plenty of holding power, with less weight which is also beneficial for Benchrest setups. 

Something to consider when using old school rings without inserts - For a stress free installation you almost always must lap the rings - with anodized aluminum alloy rings this is not a good idea. The Burris XTR Signatures never need lapping for a virtually stress free installation every time. 

• Unique, self-centering, dual steel clamps at the base, with full cross-through steel bolts, assure proper center on any width Picatinny rail, while adding extra strength The floating / self centering ring mounting design provides better alignment to the rail for both rings. 
•  Revolutionary Pos-Align^® Inserts technology, in a tactical ring configuration gives a virtually stress free scope mounting solution.  
• 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. This allows you to adjust for additional elevation travel if desired or to keep the adjustment as close as possible to the optical center of the scope for best performance optically. 
• Corrects misalignment caused by off-center receiver holes, warped rails or warped actions. 
• Corrects for bases being slightly off-center
• With up to 40 MOA of adjustment in elevation, there is no need for expensive tapered bases or shimming for thousand-yard+ shooting. You can also use the adjustment range to decrease elevation on rifles that might have too much slope in their Picatinny rail. 
• Rugged, robust aluminum tactical rings save weight and mount on any Picatinny and most Weaver 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

These rings solve all the problems that were associated with the first generation Signature Zee Rings and offer a much improved mounting solution as well as a far superior build quality over the Signature Zees as well as the wide bodied 1st generation Burris Xtreme rings. The have the width of the Xtreme and the adjustment from the inserts in the Signature Zee, but in a precision CNC'd ring body over the rather crude extruded design of the both the Xtreme line and the Signature Zee.  Basically the best of both original rings combined into one.

By putting a 20 MOA+ in the back and a 20 MOA- in the front, you can obtain 40+ MOA* of  elevation 'cant' without the need for a sloped base. Combine these rings with a sloped base and you will be able to get 80+ MOA of elevation cant for long range shooting. You can also remove some slope if needed for closer range shooting when you want your knob travel centered for best optical performance.  If your rail to bore alignment is off, you can use a combination of windage tuning and slope adjustment all within the rings themselves by rotating the position of the inserts. One ring set gives you the option of a mechanically centered reticle at 25 yards or 1000 yards simply by adjusting the inserts. 

*The amount of adjustment obtained depends on how far apart the rings are. The closer the rings the more movement will be obtained. Actual rings may differ in appearance from the displayed image depending on the model.

The rings will ship for free with a scope order. If you get just the rings there will be a $19 shipping fee added.