This mech paper model is Gargoyle (Man O' War), an extremely fast assault OmniMech developed with the Timber Wolf as replacements for the first-generation Woodsman OmniMech, from the game Classic BattleTech, the papercraft is created by Yogsolthan, skins by Sturm. The size of finished model is about 210 (H) x 136 (W) x 115 (D) mm.
The Gargoyle is therefore commonly seen among Clan Wolf, and was a featured assault OmniMech during the Clan Invasion. The Gargoyle earned the name Man O' War from the Inner Sphere forces because of its effectiveness. Along with the Timber Wolf and Naga, the Gargoyle debuted in 2945. [Source: sarna]
You can download the papercraft model here: Classic BattleTech - Gargoyle (Man O' War) Free Mech Paper Model Download [Skins]