Avi sez, "AFOL Shannon Sproule built this charming Raygun entirely from LEGO parts." Shannon calls it the Russian Tokarev TT-34 Atomiser and notes, "Every mechanonaut was issued with a Tokarev laser pistol. They were small, lightweight and proved very reliable on the lunar battlefield." As this implies, there's a whole contrafactual mythology that this belongs to, called Battle for the Moon.
Russian Tokarev TT-34 Atomiser (Thanks, Avi!)
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.