This is a posable action figure of an item from the Gundam universe.
A poseable action figure of the RX-78-2 Gundam, from Gundam: The Origin, the manga revision of the original series. Very beautifully detailed and painted, the figure comes with a beam rifle (attached to a spare right hand), a bazooka (also attached to another spare right hand), an 'open' spare left hand, two 'beam' parts (to attach to the muzzles of the guns), backpack and shield.