The Mark XLIV (Mark 44), also known as the "Hulkbuster," is an Extra Heavy-Duty Modular Armor[1] created by Tony Stark and Bruce Banner as a security safeguard in the event of an uncontrollable Hulk rampage. The armor works by attaching itself to the base armor of the Mark XLIII.

The armor was featured in Avengers: Age of Ultron, wherein it was used through Veronica's activation to subdue a rampaging Hulk in South Africa.
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