This mecha paper model is Constanze, piloted by the android R. Instro, after realizing that his late father's supposed legacy was a weapon made to destroy the city, from the animated television series The Big O, the papercraft is created by WebDude.
Constanze produced sound waves capable of cracking Big O's armor and acting as a shield against attacks. It was defeated when the Big O destroyed the arms with a missile barrage.
Instro's highly advanced, one-of-a-kind hands are permanently plugged into Constanze's controls once he inserts them, forcing him to destroy them to disconnect himself from the machine. [Source: wikia]
You can download the papercraft template here: The Big O - Constanze Free Robot Paper Model Download