The Mark XXXI High-Velocity Centurion suit (or Piston) was created after the events of the New York battle.
The Mark 31 has teal and silver colored plates. It's face mask is colored light gold, and it uses one of the basic designs of the Iron Man suits, only it is more enhanced and lighter in structure.
The suit was created after the New York battle. Tony realized that there couldn't be one suit that could do anything, so he started building suits specializing in certain areas. Piston was placed into the Hall of Armor along with the rest of the Iron Legion. When the "House Party Protocol" was ordered, it and the rest of the Iron Legion flew to assist Tony in the Extremis battle. It was destroyed by the the Extremis soldiers.
|Iron Man armors|
|Primary Armors||Mark I | Mark II | Mark III | Mark IV | Mark V | Mark VI | Mark VII | Mark XLIII | Mark XLIV | Mark XLV ||
|Iron Legion||Mark VIII | Mark IX | Mark X | Mark XI | Mark XII | Mark XIII | Mark XIV | Mark XV | Mark XVI | Mark XVII | Mark XVIII | Mark XIX | Mark XX | Mark XXI | Mark XXII | Mark XXIII | Mark XXIV | Mark XXV | Mark XXVI | Mark XXVII | Mark XXVIII | Mark XXIX | Mark XXX | Mark XXXI | Mark XXXII | Mark XXXIII | Mark XXXIV | Mark XXXV | Mark XXXVI | Mark XXXVII | Mark XXXVIII | Mark XXXIX | Mark XL | Mark XLI | Mark XLII|
|War Machine Armors||Mark I | Mark II prototype | Mark II | Iron Patriot | Mark III | Mark IV | Mark V | Mark VI | Mark VII|
|Related Armors||Iron Monger | Whiplash (Mark I • Mark II) | Hammer Drones | Rescue|