This mech paper model is Summoner (Thor), a highly mobile heavy OmniMech that is commonly used by Clan Jade Falcon in a wide variety of roles, from the video game MechWarrior 3, the papercraft is created by Vlmarshall. The size of finished model is about 249 (H) x 186 (W) x 169 (D) mm.
Barely a second generation OmniMech, the Jade Falcons introduced the Summoner just after becoming the first Clan to win OmniMech technology from Clan Coyote in 2863. The Summonerearned the Inner Sphere code name Thor for its powerful, yet simple arsenal. The Summoner's balanced mix of speed, mobility, armor, and firepower make it a highly effective and reliable OmniMech. [Source: sarna]
You can download the papercraft model here: MechWarrior 3 - Summoner (Thor) Free Mech Paper Model Download