So let me get this straight- in order to fire the gatling gun, you pull back the bolt, cock the cylinder and pump on the rifle, then pull the trigger. I agree. Very credible.
Ingenious design - the firerate goes down as the cylinder gradually empties, so there are fewer rounds to line up with the active barrel. This makes you conserve ammo when you're running low.
I like that the bayonet and laser pointer are on the rotating part, too. Apparently that was my first impression because the rest of this seems pretty solid, really.
Whirrrrrrrr [Pink Floyd laser show and Powerpoint-y scope from the big honking knife in the way]