After listening to a Our fake History Podcast and reading up on it my self, I wonder has there been any significant evidence to support this claim? Did Archimedes design anything that remotely resembles what is being called a "death ray"?
The concept itself is sound. The execution is a different matter. More can always be said on the matter, so if you know of Archimedes and his mirror rig, don't let this post stop you! In the meantime, OP, you may be interested in u/QuickSpore's assessment of the putative death ray.