As a Sci-Fi buff and a scientist, I think I'm obligated to build one of these when I retire. Not much punch for it's size, but some clever engineering and thinking went into this. http://www.engadget.com/2015/10/19/3d-printed-handheld-railgun/ Another 20 years of development and we all may have one in our gun safes.
Well, You would be a perfect candidate for a replicator of my STG or "Simplified Tesla Generator". PM me and we'll talk I am sending out the "Date of Origination" emails, with a brief description of the theory and overview of the device. If it works, replicators will get a "free working model" for the cost of parts.