Thread: How to remove stripped scope ring screw?

With a dremel cutting disc, cut a notch across the screwhead for a broad flathead screwdriver and you should be able to get it out.

Alternatively, looks like you can access the bottom end of the screw and add a notch at that end for a smaller screwdriver.

BUT first I'd try and get a broken screw extractor. Won't be the only time you need one. Get at M10, bunnings, Hammers, Tool shed etc.