If you're planning a shotgun-themed wedding, then Etsy seller MysticLair's edible shotgun shell cake-toppers might just be the thing for you. Also potentially useful for adapting in a shotgun-themed rendition of the oft-fatal "bullet-catch" conjurer's trick.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.