These mounts allow you to adjust the scope mounting height - ideal for bullpups and other PCPs shooting at longer distances. Its dual-locking screw is what allows you to set your desired height or cant angle in order to get more elevation.

For long-range shooters who run out of adjustment clicks, these scope mounts allow you to keep the front mount at its lowest and elevate the rear mount to the highest point so that you can zero in your gun far beyond what standard mounts allow you to do while keeping the optical center of your scope unmoved.

It also allows you to use your scope when the rail position is awkward or there's a lack of space between the rings.