This mech paper model is Mektek Ursus, Khan Bjorn Jorgensson's ideal fusion between Clan and Inner Sphere technologies, from the video game MechWarrior 4, the papercraft is created by BLaaR. The finished model stands about 26 cm tall.
The first Clan BattleMech designed and manufactured entirely and exclusively in the Inner Sphere, the Ursus uses Inner Sphere technology that has not been surpassed by that of the Clans where possible to maximize the efficiency of the factories Clan Ghost Bear captured during the Clan invasion. The rest of the parts are imported from Clan space. Though it took over seven years, Ghost Bear technicians made the Clan and Inner Sphere parts work together to create this second-line 'Mech. The Ursus finally saw full-scale production in 3059 and was shipped to garrison units throughout the touman. Eight and a half tons of Ferro-Fibrous armor protect this design, but only because it would have been inefficient to use any more. An ECM Suite is also used to disrupt enemy electronics. [Source: sarna]
You can download the papercraft model here: MechWarrior 4 - Mektek Ursus Free Mech Paper Model Download [Skins]