What kind of scope are you wanting to mount? I modified a set of aluminum Unertl mounts for a Haenel with a similar rib on the barrel. I just put them in the mill and used a dovetai cutter to widen out the dovetail in the rings. It took about 30 minutes total. I think similar treatment to various types of mounts / rings would work. I have a set of 1" rings that have a rimfire dovetail. They resemble Talley's and I could donate them to the cause if you want them.