This mech paper model is Marauder, first built by General Motors in 2612 for use as an attack and direct fire support BattleMech, from the game Classic BattleTech, the papercraft is created by Whammy. The size of finished model is about 210 (H) x 145 (W) x 175 (D) mm.
The first 'Mech to diverge from the traditional humanoid shape of previous machines, the Marauder was one of the most well-known 'Mechs in existence and originally meant to usher in a new generation of 'Mechs. Unfortunately, with the fall of the Star League, this new generation never quite materialized. On its own merits though the Marauder was a devastatingly powerful 'Mech, outclassed only by larger machines like the Stalker and BattleMaster.
During the years of the Star League the Marauder was a favorite in the Gunslinger Program thanks to its tremendous firepower, while its advanced electronics endeared it to many battalion and regimental commanders. On the hellish battlefields of the Succession Wars, massed formations of Marauders proved devastating as shock units in breaking through enemy lines. However, the rarity of these 'Mechs often meant they had to be paired with other, similar 'Mechs such as the Warhammer and Thunderbolt.
When the Helm Memory Core was recovered, the Marauder was an obvious candidate for lostech upgrades. House Davion were among the first to field an updated variant, but their eagerness backfired when House Kurita captured Quentin - and its Marauderfactory - in the War of 3039. With the Kuritans in possession of this first variant, the Federated Commonwealth decided to build a second using a different configuration. Other lostech-inspired variants were also built in time for the Clan Invasion.
A second revitalization of the Marauder occurred at the hands of the Capellan Confederation, though notably they had never before built the 'Mech themselves. On behalf of Ceres Metals Industries, the Chancellor himself, Sun-Tzu Liao, negotiated a deal to acquire the design from General Motors in exchange for allowing HildCo Interplanetary to resume exporting its products to the Federated Suns. While a success, disturbing rumors from the Peripheryreported a number of these seemingly backwater realms fielding updated Marauders of their own, with origins suspected to be of a sinister nature. [Source: sarna]
You can download the papercraft model here: Classic BattleTech - Marauder Free Mech Paper Model Download [Skins]