This mech paper model is Hauptmann, a mech from the video game MechWarrior 4, the papercraft is created by Shiftdel, and the scale is in 1:40. The size of finished model is about 285 (H) x 215 (W) x 143 (D) mm.
The first OmniMech both designed and built by the Lyran Alliance. The inspiration for the Hauptmann is drawn from the DaishiOmniMech used by the Clans. Using information from captured Daishis and data gleaned from the construction of the FirestarterOmniMech, which was shared by the Draconis Combine, the end result is a powerful OmniMech capable of defending itself in most combat situations. The Hauptmann is built on a standard chassis and powered by a 285 fusion engine, adding to the 'Mech's durability as it cannot be killed by a side torso loss. The Hauptmann has eleven double heat sinks fixed on the chassis and can add more if needed in its various configurations. For protection, the Hauptmann carries eighteen and a half tons of armor and has CASE fixed in the right torso to protect against an ammunition explosion. [Source: sarna]
You can download the papercraft model here: MechWarrior 4 - Hauptmann Free Mech Paper Model Download