This mech paper model is Firefly, a 'Mech thought to be extinct from the rigors of the Succession Wars, from the video game MechWarrior 4, the papercraft is created by BLaaR. The size of finished model is about 200 (H) x 148 (W) x 153 (D) mm.
The Firefly is a well-armed recon 'Mech that tips the scales at thirty tons. Since it was reintroduced to the Inner Sphere, the 'Mech has been refitted by the Wolf's Dragoons with Star League technology. It has a maximum ground speed of 86.4 km/h and can jump up to one hundred and twenty meters. As a scout 'Mech, the Firefly gives average performance with its energy weapon-heavy arsenal and is useful in both a recon and in a guerilla fighter role. [Source: sarna]
You can download the papercraft model here: MechWarrior 4 - Firefly Free Mech Paper Model Download