Here is a picture of the Weaver right next to the EGW. Weaver is on the left and the EGW on the right mounted on my Axis. I know the picture leaves a lot to be desired, but if you look closely you will see the larger base on the EGW which of course gives it the additional height. As for utilizing it for PRS, thinking it would work just fine, going to put this one on my new 22-250.