Pretty darn good - Burris 30mm Signature Universal Dovetail Scope Mount Rings

Anyone with a premium scope shouldn't even think of NOT getting these - to save the tube from marring if nothing else. Workmanship is decent (not great. Sides are not quite uniform in shape). On the 30mm, the package says MEDIUM, yet they are low (as in VERY LOW) - the base, no thicker than the ring *thickness* dimension itself, so Burris has made a mistake here, and many bloggers on websites from Opticstalk to F&S have noted this). But, there is a lot to like and I'll stick with em:-)