[sarcasm] Since when has a "minor" detail like that gotten in the way of a good STORY for a newsie? Assault weapon, machine gun, assault revolver - who cares what they call it, they're all EvilscaryblackdeathWMD!!!!!1111111[/sarcasm]
As for "Sparky", I first heard about him from Tanknet. He's famous for his, um.. "out of the box" ideas that are usually considered absurd. He apparently hates the Stryker and thought that the M-113 APC would be the be-all, end-all AFV. He also single-handedly came up with the nickname "Gavin" for the M-113, and apparently writes as though that name is in fact official. Take a look at this
LINK for a great explanation behind the - whatever you want to call it.