This mech paper model is Hunchback, a respected and feared Reunification War-era street fighter that has been in production since its introduction in 2572, from the video game MechWarrior 4, the papercraft is created by BLaaR. The finished model stands about 25cm tall.
Built for urban combat and close range brawling, this BattleMech has the heavy armor and weaponry to stand up against any foe in the dense cover of a city environment. Its heavy armament does come at a cost: in terms of maneuverability and heat dissipation the Hunchback is merely average, while the lack of long-range weapons means, in the open, the Hunchback is little more than a slow moving target. In an attack the slow speed of the Hunchback forces it to participate as part of the second wave, exploiting any weaknesses in the enemy's armor after they've been softened up.
The Hunchback was originally designed and produced by Komiyaba/Nissan General Industries and sold throughout the Inner Sphere and Periphery, often fielded as part of medium and assault lances. The company was destroyed as a result of the Succession Wars, but the Hunchback continued to remain popular, especially in the arsenals of House Kurita and House Liao where it fit the dueling nature and all-or-nothing combat styles of the two Successor States. Dwindling stockpiles of spare parts and personal dislike for a weapon which could easily overheat the 'Mech led many owners to replace the Hunchback's trademark autocannonwith another set-up, resulting in a variety of variants collectively known as the Swayback due to the altered nature of the machine's torso. Eventually Kali Yama Weapons Industries bought the rights to the Hunchback and restarted production at their factory on Kalidasa to supply House Marik with large numbers of the 'Mech.
The rediscovery of lost technology in the years prior to the Clan Invasion inspired a number of old designs to be upgraded, the Hunchback included. Under contract from the Free Worlds League Military, Kali Yama engineers designed a variant, the HBK-5M, which sought to improve upon the original while still maintaining the "soul" of the machine. While the new variant included several improvements, mostly involving extra protection against ammunition explosions and overheating, to the chagrin of many MechWarriors this came at the cost of reduced ammunition for the autocannon. Their objections ignored, production began in 3046. The new variant came into widespread use throughout the FWLM until Operation Guerrero, when this drawback was responsible for the failure of several advances. After this, Kali Yama finally produced a new variant -- the HBK-6M -- which addressed this concern. In the years since Norse-Storm BattleMechs opened a refit line to produce new Hunchbackvariants and the 'Mech saw use on both sides in the Jihad. [Source: sarna]
You can download the papercraft model here: MechWarrior 4 - Hunchback Free Mech Paper Model Download [Skins]