This mech paper model is an Orion, built in 2456 as the first true heavy BattleMech from the video game MechWarrior 3, the papercraft is created by Shiftdel. The size of finished model is about 354 (H) x 224 (W) x 138 (D) mm.
Originally designed for the Terran Hegemony to maintain its dominance and built on Hesperus II, the Orion is a dependable workhorse design that can handle almost any combat role, thanks to its mix of long- and short-range weaponry and its respectable armoring. After the K model was introduced in 2525 the 'Mech first saw combat during the Reunification War and continued to serve the Star League and its Member States for the next few centuries. Perhaps its most famous role was as the personal 'Mech of Aleksandr Kerensky during the Amaris Civil War, and it was while piloting his Orion that the general kicked down the palace doors to take the Usurper prisoner.
After the fall of the Star League Kali Yama Weapons Industriestook over production of the Orion, building new models from their factories on Kalidasa. This left the Free Worlds League as the only producer of new Orions during the Succession Wars, although the other Successor States were capable of building spare parts to repair their 'Mechs, and meant the Free Worlds League Militarywas the largest Orion user. When Kali Yama merged to create the Kali Yama - Alphard Trading Corporation Orion production was started up on Kendall as well. The League's dominance in new Orions began to change during the Clan Invasion when the Successor States met on Outreach and agreed to work together to combat the Clans. Kali Yama/ATC was among those companies which agreed to sell war materiel, including the Orion, to the other States undergoing Clan attacks. In spite of the design's age it still finds itself utilized extensively on the modern battlefield and new variants continue to be produced. [Source: sarna]
You can download the papercraft model here: MechWarrior 3 - Orion Heavy BattleMech Free Paper Model Download [Link 2]