I have a SWFA fixed 12 power scope with 30mm tube on my AR rifle shooting 223. When I purchased the scope from SWFA it came with some scope rings so that is what I used to mounted the scope. I seem to be getting some unpredictable accuracy shooting out 100 yards, some good groups and some not so good with some match ammo and some reloads. I know the rifle is only as good as the dummy behind the trigger. Has anyone used these rings with any success? Also if anyone has any suggestions on some rings that would be a better option that would be great. Thanks.