West Magoon of Muddy Mountain Pottery created some awesome looking ray guns out of ceramics, with a technique called raku firing:
All of the Ray Guns are glazed and fired using the low-fire raku firing technique. The sculptures are pulled from the kiln while the glaze is red-hot and molten and placed into a metal barrel filled with newspaper which is then covered. This smothers the fire, which creates a reduction atmosphere, giving the glazes their metallic look.
West named each guns after a sci-fi author or character. This one above is the Rotwang Retrovivifier (+10 points if you know who Rotwang is - no Googling!)
Link - Thanks Tana Libolt!