On that Kerner and Funk, I would bet that the width of the clip on mount is the same as the width of a CZ 527 rifle. I have a Funk Jubilaum with same and it fits mine as an aftermarket alternative to scope mounting. It requires a screw driver to remove it, so not as fast as claw mounts, but very effective and certainly cost effective. (read, cheap) It is a dovetail after all. Memory fails, but I seem to remember 15MM? If not, a factory dovetail mount of some kind can be altered for the correct width. The original clip mount might be a challenge to utilize. No alteration to the original bases required, in any case, so why not?