This paper model is a simple Hetzer Tank Destroyer, a mech from the real-time tactics video game MechCommander 2 of the BattleTech/MechWarrior franchise, the papercraft is created by Vlmarshall. The size of finished model is about 64 (H) x 141 (W) x 102 (D) mm.
The Hetzer was designed as a cheap, self-propelled artillery-piece to be stationed on worlds deemed worthy to defend, but not valuable enough to station a complete garrison force or even BattleMechs. Its primary and only weapon is in the front, meaning the unit lacks a turret, making it difficult to employ in roles other than defensive ones. Also, its wheeled chassis restricts its mobility. Due to its decent protection of six tons of standard armor and its Crusher SH Cannon, combined with its low price, the Hetzer is still a valuable asset for poor commands and is especially popular throughout the Periphery. However, Quikscell Company is largely known for its poor manufacturing standards, resulting in many Hetzers being shipped with only half their components installed or even completely lacking some of them. Crews reportedly refused new Hetzers meant to replace their older ones, because they couldn't be sure that the new models would work properly. [Source: sarna]
You can download the papercraft model here: MechCommander 2 - Simple Hetzer Tank Destroyer Free Paper Model Download