Wide top straps hold zero under the most jarring recoil. Loosen the thumb nuts and you can go to iron sights in seconds. Remount the scope and you are back on zero. Detachable extension top mount rings let you position your scope 3/4" forward or backward to get the ideal eye relief.Steel strap for added strength and an aluminum saddle for reduced weight. These quick detach rings are the original Weaver style.Feature: Get the ideal eye reliefThey let you position your scope forward or rearward