I have a friend who is really into My Chemical Romance. In their music video for NaNaNa
they have ray guns. I made her one for her birthday. It was a western style cap gun but I molded Shape Lock over the barrel for the look they have in the video. It was then painted with model paint in sapphire metallic and school bus yellow or something like that. The trigger still pulls, but it is nonfunctional. Use your imagination!