It's funny how unevenly the real world keeps pace with science fiction. Smartphones have capabilities that Gene Roddenberry never imagine a portable device could have, but guns still use tiny powder cartridges to launch hunks of metal at things. The phasers, ray guns, and blasters of Star Wars, Star Trek, and other sci-fi works have yet to appear. Don't let that hold you back! This video will show you how to make a cool retro ray gun prop that you can use with a Halloween costume or in a film. You'll need to buy some parts, but it's worth it as the end result looks much cooler than some of the simpler examples we've seen.