Obviously, dovetail rings are best suited to dovetail mounts. Dovetail rings are also called tip-off rings due to the ability to tip them off the dovetail rail when screws are loosened instead of having to slide
Most pistols have a dovetail cut on the top of the slide where the sight fits right in. Take note that when choosing a sight, make sure that the sight matches the dovetail's cut size on your pistol to ensure compatibility. You can also bring your pistol to a gun shop, where you can...