Eh, I feel like it should be the other way. It just doesn't look right as one word.
Posted under General
I'd support ray_gun over raygun. While "raygun" seems dominate in current usage, even the wikipedia article has spots where the writers were mixed with some spots using "ray gun" and others using "raygun" in the same article.
Since "laser gun" and "beam gun" are two words, I'd say "ray gun" should be no different.