Iron Man's armor (Mark XXXI)

File:Iron Man armor Mark XXXI.png

Mark XXXI

Mark XXXI of Iron Man's armor, codenamed Piston, was Tony Stark's 31st Iron Man suit, following Mark XXX. Mark XXXI was used during the Battle on the Norco, and combined elements of Mark XXIX and its predecessor, the Mark XXX, making it both power efficient and fast.

Mark XXXI was eventually destroyed by the Clean Slate Protocol. It was succeeded by Mark XXXII.