Hello, i made a little search before write this Thread, but i didn't find anything about theese specific kind of Leupold rings. I have a new Rem700 CDL SF 30.06 (limited edition 1906-2006), and i would like to use a good steel ring, i like very much the models with 4 screw i think they are stronger than the models with 2. Watching the Leupold catalog, i found the PRW models .... what do you think about this model ? .... i can see they don't "work" like the single base models, but they have to be installed on a Weaver base ... Your point of view ? .... Thank you guys !