
A later model, seen in issue 229, Model X, Mark II, was built in Tony's "tinkering" lab beneath his oceanside home.

Like the previous model, the space inside the armor was needed for Stark's incredible radar-bending stealth modules, so some of Iron Man's standard functions and applications were left out. But unlike the first Mark, this version of the Stealth Armor contains repulsors (connected to a greatly pared down weapons system. Iron Man only has enough energy for three repulsor blasts). Space was in such short supply that to fit in the weapons, computing power was trimmed. The Stealth Armor has only minimal CPU hardware, a reduced-instruction-set computer for housekeeping duties only. Tony also had to slim down his communications array. While he retained a two-way receiver, Stark had to ditch his FM radio (making long flights tiresome). In addition, IM only had room for two negator packs in his small storage bins.
What the armor lacks in strength and firepower, it makes up for with guile. The exterior of the Mark II suit was crafted from an alloy mesh weaved with prismatic fibers. The resulting surface alters the way light reflects off of it. Operating on similar principles this is a limited version of his Chameleon Mode (on the Model XII armor), which caused IM to blend in to his surroundings. This cloaking device merely changes the armor's exterior color (turning him white, for example). While not full-proof, it is effective.
Other known features: The armor contains a multi-frequency scanner.
Special feature on this suit: Model X, Mark II utilizes a nifty rocket booster for intercontinental travel (made necessary by the rather limited nature of the stealth construction). This saves Shellhead fuel and energy.
Armaments: 40mm Low Power Omnibeam, 25mm Low Power Palm Repulsors.
Model X, Mark III
Another version was used in Iron Man Annual 13. Because there appears to have been some return to the non-weapons design of the Mark I, this armor must be regarded as Model X, Mark III. Despite the loss of Repulsors, the armor does include a Unibeam and ECM Scramblers. Visual perception--what us mere mortals might regard as "sight"--was improved with enhanced photon valve vision gear in the eye pieces.
Stark improved his stealth technology dramatically with an entirely new suit built for taking on the Black Panther: The Plastic Ghost Armor.
