I see 2 possible options; the Henneberger DVM montage (doctersight visier montage), that is mounted in the dovetail, or the MAK macnetic - a mount that is tightly "squeezed" on the rib by strong magnets. However, the latter doesn't fit on a side by side, only o/u barrels. I'ts intended for use on shotguns so the recoil on a 9,3x74R or bigger might be an issue.