This paper model is a Malcador Annihilator tank, based on the game Warhammer 40K, the papercraft was created by Patoroch. The Malcador Annihilator replaces the standard variant's limited-traverse Battle Cannon with a Twin-linked Lascannon and its forward hull weapons mount with a Demolisher Cannon.
This variant was a field modification carried out on battle-damaged or unfinished production hulls intended to "up-gun" the tank's weaponry and extend its battlefield utility. The pattern's detractors hold that the variant is a hybrid intended to carry out two roles, neither of which it can fulfill with any real ability. The tank is simply too slow and too large to serve as a true "tank hunter" but is not large enough or heavily armed enough to be matched against a true super-heavy tank like an Imperial Baneblade in open combat. Against other, more conventional armoured vehicles when it is part of a larger offensive force, the Malcador Annihilator can still prove its worth in the hands of a skilled crew. [Source: Wikia]
You can download the paper craft model here: Warhammer 40K - Malcador Annihilator Tank Free Paper Model Download [mediafire]