So you found the picture, but did not read the post associated with it?
It's mine. Give it back.I don't see what's so surprising about an oversized gun.
In short, this was the first pass at vwep (player holding different weapon meshes based on which gun he had). This is what the gun that spins around on the ground looks like in the players hands, to give you an idea of scale.
How about over-sized guns on April 1st instead of that horrible banana texture that makes everyone's eyes bleed after two minutes? =)