Known weaponry includes repulsors, uni-beam, pulse bolts, and an energy blade. Defenses include deflectors. Other type of weapons and upgrades seems to be created by Stark's imagination, such as a boxing glove.
This entire armor is kept inside Tony's body until mentally commanded in which it manifests itself as the Iron Man Armor. The armor is made up of Nano-Machines that can now be commanded to turn into any type of structure upon Stark's skin. For example, the nano-machines can turn into clothes, other armors, or even different beings completely, by having the nano-machines change their properties into whatever Stark wants them to. It can also dissociate to transform into the Iron Man armor whenever Stark wishes. The armor and Stark's own transhuman body are powered by the high-yield arc reactor mounted in his chest. The high output of the arc reactor has greatly augmented Stark's intelligence and provided him superhuman-level multitasking and learning capabilities.
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.