It was mentioned and linked in an old Cracked.com article, and the people who make it have videos on youtube. Very heavy metal, with four AR 15 rifle rail thingies for covering in laser sights and over overkill stuff, as well as bashing in skulls.
That's awesome/hilarious, but also raises a question, out of the entire Imperium's history, has no one really bothered to add just one simple upgrade for the lasgun like a grenade launcher? It just nags at me from time to time. Ok sure ammo would be a pain for 40mm but still you can't possibly have thousands of armies with the essentially same weapon type and have nothing to add aside from a knife at the end.
Good question. I also asked myself why astartes don't use camouflage and artillery, among many other things.
As I said during one forum discussion: 'Logic and common sense are not applicable when we speak about Warhammer. In Warhammer everything serves the only one purpose - to make things look grimdak and epic. That's why we have 42'nd millenium super soldiers with swords and infantry with gear too shitty even by WWII standards'.
They do have them, its just not at all practical to give them to most guardsmen since their job description is one word, or three depending on how you phrase it. Elites do and dark heresy does have the rules for them, they are just rare especially since the Imperium is basically dark ages in space. That and what the dude before me said. kool dude.