This paper model is a Red Scorpions Land Raider Mark IIIb Tank, based on the game Warhammer 40K, the papercraft was created by Patoroch. There are other Land Raider paper crafts at the site:
Warhammer 40K – Land Raider MkIA Spartan Tank Free Paper Model
Warhammer 40K – Land Raider MK I Spartan Tank Free Paper Model
Warhammer 40K – Land Raider Prometheus Tank Free Paper Model
Warhammer 40K – Land Raider Mk II Tank Free Paper Model
The Loyalist Red Scorpions Chapter of Space Marines is known to be composed of conservative Imperial purists who are famed for their complete and utter devotion to Imperial doctrine, past the point where pragmatism or even reason would seem to require otherwise. The Chapter is most renowned among other Astartes for their absolute adherence to every line of the Codex Astartes, which is unheard of in any other Chapter -- including the Ultramarines.
Due to their history of conflict with the Forces of Chaos, they refuse to deal with any xenos species or any humans that they consider as tainted by mutation of any kind, even Imperially-sanctioned Abhumans like the Ogryns or Ratlings. They will obviously not serve with Beastmen, but they also utterly refuse to serve with the few remaining Squats. Equally unique in nature is the frequency with which the Red Scorpions' Apothecaries are present in the Chapter's Tactical Squads as squad leaders in place of a Sergeant.
You can download the paper craft model here: Warhammer 40K - Red Scorpions Mark IIIb Land Raider Tank Free Paper Model Download [Box] [Gavitex]