Thread: Help required - scope rings

So everything I found said a cz 452 american takes 3/8" rings so I picked up a pair of B-Square 3/8" dovetail rings went to put them on and I end up with the following. If I tighten them any further he clamp comes in on an angle and wont sut flush with the rings. Now am I doing something wrong (which is entirely possible) or do they not take 3/8" at all. The very helpfull manual says to see a gunsmith to fit a scope. Unfortunately my other scopes fit pic-rails so I cant even try them.
Thanks