I mounted a Nikon monarch 3-9x42mm on my Sb2 with Warne medium height rings. Weaver 93a base that Benelli recommends. Really like Warne rings .The plugs that benelli uses to cover up the rail mounting screw holes are tough to get out with out scratching gun. I used a pointed object to push the little plugs out. I went from inside of receiver out .I had to screw the back rifle sight all the way down but was able to keep on. Depends on the size of your objective that will decide size of rings low, medium or high.I tried to go as low as possible.But have 42 mm objective. I have not shot yet so i cant tell you if it is perfect.