Things I liked: excellent rings.
Things I would have changed: Nothing
Things I liked: The price is great. Simple and easy design. Mounts very well to my springers.
Things I would have changed: Nothing so far
What others should know: Just make sure you order the right mounts for first time.
Things I liked: Perfect fit on my Benjamin Marauder 25 caliber
Things I would have changed: You can't change Perfection it's a great set of rings
What others should know: If you are going to put it on a Benjamin Marauder you need these rings because they are tall enough and they fit the 11 millimeter dovetail perfectly
will this fit on a stoger x20s
Yes it will fit the 11mm dovetail but remember these mounts are for a 30mm scope not the one inch scope. If your using a one inch scope then these will not work? So it depends on which scope you plan to use since you didn't specify.
does it come with a hex wrench?
Well it comes with an Allen wrench. Multiple for the various size heads.
Unknown most do?
will these rings fit a Benjamin discovery rifle