Just a LegoŽ rendition of the hand-held gatling gun, never actually put into production, but popularized in film nontheless. My Photoshopped muzzle flash turned out well enough that I thought I'd post it.
The body of the gun is highly stylized, not being based off any actual weapon, and lacks such practical features such as an ammunition feed.
For the record, I came up with this particular barrel design without the inspiration of other LegoŽ creations.
Unfortunately, due to the fact that my collection is not as all-encompassing as I would like, the actual model is not quite as I would like. To the left is a sketch outlining my original assembly options for the minigun.