ok, I know I haven't got an ESB suit but as someone once said "you can't ever have enough guns"
It's a Nintendo zapper that I'm currently modifying into a better version.
After cutting the main body up with my trusty Dremel, I've used sintra to build up the basic shape of the blaster.
2 sizes of alumilium tube make up the barrel, and a UHF connector is the nozzel at the end.
It's under "Blaster" at http://photos.yahoo.com/darthbish