This mech paper model is Malak, the lightest in the Word of Blake's Celestial series of OmniMechs designed for the Manei Domini, from the game Classic BattleTech, the papercraft is created by Yogsolthan. The size of finished model is about 48 (H) x 39 (W) x 38 (D) mm.
The Malak, Arabic for "angel," features a dazzling array of new construction materials in an attempt to free up as much weight as possible in a fast and reliable package. The 'Mech is protected with six tons of Light Ferro-Fibrous armor which weighs less than standard armor. To free up even more space, the 'Mech mounts an XL Gyro, and a small cockpit in addition to its Endo Steel frame. A C3i Computerallows it to sync with other Manei Domini so equipped. Nine and a half tons are left for modular equipment. [Source: sarna]
You can download the papercraft model here: Classic BattleTech - Malak Free OmniMech Paper Model Download