Unlike earlier armors, this new armor does not appear to rely on motors and servos for motion. Instead, the nano-machines create a second layer of artificial muscle over Stark's body, upon which additional structures are assembled. This also enables the armor to self-repair and be almost invulnerable, as the armor is capable of transforming and healing itself, by having the constantly replicating nano-machines replace anything that is lost or used, as long as the power output from the arc reactor isn't interrupted or terminated.
The neurokinetic user-controlled morphologic nanoparticle bundles that form the suit reside in Stark's body, and form a fibrous wetweb of iron and platinum, that can be commanded to form any type of structure upon Stark's skin, from weaponry to clothing, and can even stop a howitzer shell.[10]
Known weaponry includes repulsors, uni-beam, pulse bolts, tasers,[2] and an energy blade.[11] Defenses include deflector shields. Other type of weapons and upgrades seems to be created by Stark's imagination, such as a boxing glove,[5] large guns extending from his arms,[10] or cannons.[12]
The suit's repulsors, which are located around the knuckles, chest, back and legs of the armor, as well as in the traditional palms, now function also as cameras, or "eyeballs," which afford Stark a 360-degree panoramic view around himself