...or, to use the proper technical term, an Aether Oscillator. New Zealand special effects house Weta, who designed props and miniatures for King Kong and the Lord of the Rings, have recently created a line of toy rayguns. For example: the F.M.O.M Industries Wave Disrupter Gun modelled here by the lovely Miss Leila Phantom. Created from drawings by Greg Broadmore, and then cast in steel, these $690 (!!) laser pistols are made to look like something from an old Flash Gordon movie.
For the high-maintenance nerd in your life.