This papercraft is an Iron Man Mark 28 (Mark XXVIII, famously known by its name as the "Jack") Bust, from Marvel Comics' comic books and films, the papercraft is created by Rafael Cunha. The finished model is about 50cm tall.
The Mark 28 is a Radiation-Zone Suit, and was one of several new Iron Man Armorscreated by Tony Stark as part of the Iron Legion. The armor was created sometime after the Battle of New York.
It was featured in Iron Man 3, and made it's debut when Tony orderedJ.A.R.V.I.S. to initiate the "House Party Protocol", in which it was activated along with all the other suits to aid Tony in his battle against Aldrich Killian. [Source: wikia]
You can download this papercraft template here: Marvel Comics - Iron Man Mark 28 (Mark XXVIII) Jack Bust Free Papercraft Download