Iron Man Mark XLII is an advanced modular armor suit used by Tony Stark in Iron Man 3. It is notable for its remotely deployable, gold-and-red segmented design and the ability to assemble around Stark on command. In the film, the Mark XLII serves as one of Stark’s key experimental suits during his battle against the Mandarin and Aldrich Killian. It represents Tony’s obsession with constant improvement, automation, and control, while also highlighting the vulnerabilities and limits of his technology.