Well worth your money - Evolution Gun Works HD Tactical Aluminum Rings, 30mm

Used these .850" high rings to mount at Vortex Viper PST 6-24x50 scope on a Savage 10FCP HS precision .308 with an EGW HD aluminum 20moa base. This setup is perfect with just enough room for flip open scope caps. The rings mount up perfect with no play on the rail before tourqing down. I have not had any scope movement. I didn't even have to lap them as the are machined together with matched tops. Worth ever penny. I bought two sets of cheep 30mm rings before I got smart and bought these. Save yourself the headaches I had and buy these first.
Pros: Precision, quality, robust
Cons: None

This review was written in the old system and had content requirements that are different than reviews written today.