This mech paper model is Slayer, a House Kurita heavy fighter designed before the fall of the Star League from the real-time tactics video game MechCommander 2 of the BattleTech/MechWarrior franchise, the papercraft is created by Vlmarshall. The size of finished model is about 87 (H) x 493 (W) x 400 (D) mm.
The Slayer is noted for endurance and armor. A multi-role fighter, the Slayer has the firepower to take on both other fighters and 'Mechs, with many pilots mistaking the compact design for a lighter craft, a mistake they rarely live to repeat. The Slayer also boasts a double capacity fuel tank, allowing it to loiter over the battlefield for extended periods of time. [Source: sarna]
You can download the papercraft model here: MechCommander 2 - Slayer Aerospace Fighter Free Paper Model Download [Link 2]