This mech paper model is the Archangel, a highly configurable (sub-)type of BattleMech developed by Clan Coyote during the Golden Century, based on the BattleTech wargaming and science fiction franchise, the papercraft is created by Yogsolthan. The size of finished model is about 116 (H) x 116 (W) x 92 (D) mm.
Debuting in 3069, the Celestial series of OmniMechs are engineered to be used by the elite Word of Blake Manei Domini troops. The Archangel is the largest of these. Designed to be an "anchor" for Word formations, the 'Mech is known as a "zombie" because of its ability to take extreme amounts of damage and continue operating. The Archangel features a compact fusion engine, compact gyro, a small cockpit, and nineteen and a half tons of standard armor, which frees up a large amount of internal space, while an Endo Steel frame opens up free tonnage, making heavier components possible. A pair of C3i Computers helps direct and coordinate fire.
You can download the paper model template here: Battletech - Archangel OmniMech Free Paper Model Download