I too just purchased a M75 Sako synthetic stainless rifle and I have been finding out that ring choices are few and far between. The Leupolds are fine but medium height is the lowest they come in (both nickel, matte and blued). I haven't called them but I imagine that these would accommodate at least a MM obj., and perhaps a MM. I don't like any more height (or objective size) than necessary, so I've found only come up with one other lead. Sako makes combination ring-base sets where the optilock base is not required. They list a LOW set in BLUE only. So if one is interested enough, you could purchase this set and have it refinished in either matte or dull nickle. I have tried all other sources but if someone has found one that I haven't, please inform me.