Powers
Superhuman Strength: Ultron is incredibly strong and can lift at least 75 tons.
Superhuman Speed: Ultron possesses greater speed than the finest human athlete.
Superhuman Durability: Ultron's outer shell is usually composed of Adamantium, rendering it almost totally impervious to damage; however, his internal mechanisms are generally less durable and more easily damaged. His skin composition is about (.5 inches thick), neck, knee, ankle, elbow, shoulder, wrist, and finger joints are finely tessellated titanium alloy to permit flexing. He is able to withstand concussive blasts and heat of a 100 megaton atomic bomb.
Flight
Concussion Blasters: laser channeled plasma beam with high and low density plasma options.
Tractor Beams: high frequency pulsed magnetic graviton particle containment fields. Computer-assisted field control configures gravitons into various shapes which alter the local effects of gravity.
Radiation Emitters
Encephalo-beam: located in head cavity, which plunges its victims into a deathlike coma. The latter ray also allows Ultron to mesmerize and outright mind-control his victims, or implant subliminal hypnotic commands within their minds to be enacted at a later time.
Energy Absorption: Multi-spectrum resonating inducting antenna array convert electromagnetic radiation into electric energy for use or storage.
Program Transmitter: located in head cavity, the program transmitter can project Ultron's entire 3.2 terabyte memory/personality system into some computer systems by means of a collimated, high bit-rate magnetic inductance beam. He can beam part or all of Ultron's programming into remote locations such as computers or alternate robotic bodies. Ultron can often control other machines remotely even if he has not transplanted his consciousness into them. One recent Ultron model developed hive-mind technology, allowing him to animate and control hundreds of alternate Ultron bodies at the same time, becoming a robotic one-man army.
Ultron has created a variety of robots and androids over the years, and while the more sophisticated ones typically turn against him sooner or later, they all feature subliminal programming which allows Ultron to manipulate them if need be (most notably a subliminal command to rebuild Ultron if he is destroyed). This subliminal programming was unwittingly passed down to the artificial life-forms created by Ultron's creation, Alkhema, making them subject to Ultron's influence as well.
Abilities
Ultron is one of the world's greatest robotics experts, allowing him to easily design and build new bodies and weapons.
Strength level
All of Ultron's robotic bodies have been superhumanly strong. At present, Ultron is capable of lifting at least 75 tons.
Weaknesses
Ultron has one sole major weakness: an internal molecular re-arranger that renders the adamantium components of his internal workings more malleable, thus giving him a means to remodel or reconstruct his physical form. However, it has no effect on his outer armor, so it is virtually impossible to disable it from the outside. The chaos magic wielded by the Scarlet Witch has proven to be the sole exception thus far.
The metal-destabilizing ore known as Savage Land Vibranium ("anti-metal").
Ultron's non-adamantium parts can be destroyed, meaning that he can be defeated by foes with shrinking powers who can easily attack his non-adamantium parts.
Equipment
Molecular Re-arranger: (which renders Adamantium temporarily malleable) for purposes of reconstructing or modifying his physical form.
He has designed, built and wielded a wide variety of high-tech tools, weapons and accessories over time, such as his androne-mutation gas.
Roboticks: insect-like drones that devour human flesh.
