Plumb B made this rubber-band-firing, full auto-capable chainsaw/assault rifle out of Lego, inspired by the Lancer Assault Rifle in Gears of War.
Lancer Assault Rifle - GEARS OF WAR - [mocpages.com]
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.