This paper model is a Death Skulls Gunwagen, based on the game Warhammer 40K, the papercraft was created by Patoroch. There are other Gunwagen paper models at the site:
Warhammer 40K – Snakebites Gunwagen Free Paper Model
Warhammer 40K – Evil Sunz Gunwagen Free Paper Model
The Death Skulls are an Ork tribe or clan dedicated to stealing and plundering. The Death Skulls are truly plunderers without equal. They are tremendously good at looting, borrowing, scrounging, scavenging, and stealing things from their fellow Orks, and notoriously bad at returning them. Death Skulls would make capable scientists and excellent engineers if their fascination for new things lasted longer than the time it took to steal them.
The Death Skulls see battle as a two-stage process, often hurrying the killing part in an effort to speed along the scavenging spree that follows. After the battle the Boyz really go to work, feverishly stripping the corpses of the fallen of everything from ammunition to bootlaces. Many Death Skulls will take grisly trophies such as their victim's scalp or skull into the bargain. Only when the loot is returned to the camp does the inevitable infighting break out as the Death Skulls trade, barter and auction off their ill-gotten gains.
Once they have stolen something, they personalise it to establish ownership once and for all. This often involves painting it blue, the colour which they believe attracts the eye of their Gods and protects them from harm. The superstitious Death Skulls even use blue warpaint, sometimes going so far as to paint themselves blue from head to toe the night before battle. They believe the colour blue is lucky and that it attracts the attention and favour of the Ork Gods Gork and Mork, and thus brings them better fortune on the fields of plunder.
This clan has a lot of clever and enterprising Gretchin. The Death Skulls also attract a number of Lootas because of their reputation as a bunch of loose-wallahs, spivs, and wide-boyz. As battlefield plunderers and petty camp pilferers, they often get themselves a bad name among the other clans for selling dodgy gear that is not good enough for the Death Skull Orks to keep for themselves. [Source: wikia]
You can download the paper craft model here: Warhammer 40K - Death Skulls Gunwagen Free Paper Model Download [Copy] [Box] [Gavitex]