Machine Man


  • Real Name: Aaron Stack (legal name); Z2P45-9-X-51 (model number)
  • AKA: Agent Stack, Clanky, Jack Kubrick, Machine Manwoman, Machiney, Machine Sentinel, Metal Human, Metal Demon, Mister Machine, robot-face, Sentinel Supreme, Sir MacHinery, X-51
  • Family: Dr. Abel Stack (creator / “father”, deceased); X-Model Robots (brothers, mostly deceased)
  • Base of Operation: Thirteenth Floor, Manhattan, New York City, New York; formerly Minicarrier 13; Garvin’s Garage, Queens, New York
  • Identity: Known to Authorities Identity
  • Citizenship: American
  • Martial Status: Single
  • Occupation: Adventurer; Insurance Investigator
  • Education: 
  • Gender: Male
  • Height: 6′ 0″ (1.83 m)
  • Weight: 850 lbs (385.55 kg)
  • Eyes: Red
  • Hair: Black
  • Unusual Feature: Foam-like face and arm-mounted weapons.
  • Origin: X-Model Robot
  • Universe: Marvel Prime Universe (Earth-616)

No. Kubrick had nothing to do with his creation. Introduced in 2001, A Space Odyssey (Vol. 2) #8 (1977) by Jack Kirby, X-51 was part of a series of robots created by the government, who wanted to create machine that could thinking and act like humans. One of the creators, Dr. Abel Stack took one of X-51 home with him to teach him how to function like a normal human, However, when the rest of the series began displaying psychotic behaviors, the government deemed the project a failure and began destroying them. Each of the robot had a self-destruct device in them but Stack managed to removed X-51’s one but wasn’t able to prevent it from exploding and asked X-51 to leave him. As the doctor died, X-51 took the name Aaron Stack in honor of his “father”.

Dubbed Machine Man, he began trying to help people as best he can, making human friends along the way. His first encounter with the Superhero community was when he teamed up with Power Pack and later Hulk. After teaming up with a few more heroes, he would eventually meet and fall in love with Jocasta, the female android that Ultron created to be his wife. He would eventually join Super-Adaptoid’s Heavy Metal team and attack the Avengers before switching sides and joining the Avengers. He was given a reserve status in the Avengers and would eventually fulling join them.

He was eventually infected with a Sentinel program and forced to serve Bastion but broke free. He was captured by SHIELD, who wanted to use him to create a new Deathlok. Teaming up with the X-men, he eventually sacrificed his body to save them. He survived by placing his mind in a LMD of Jack Kubrick. The Brotherhood eventually destroyed this body, and he would return to his original body. The Celestials found this presence interesting and sent a monolith to Earth to invite him to their home world. He left Earth and another, different Machine Man has since appeared on Earth.

Machine Man is a little-known character, more often used as a guest or side character. He would receive a Marvel Legends as part of the first of the Age of Ultron line-up being part of the All-Father wave.


Recommend Figure: Hasbro Marvel Legends Vintage Avengers: Age of Ultron All-Father Wave – Avenging Allies Machine Man

  • Background:
    • Machine Man design to be more human like then the rest of the X-series. Like all classic designs, it has been drawn and colored differently by different artists.
  •  Why you need it for your collection?:
    • This is one that many people may skip. He has been used as a background or supporting character for many years and many haven’t heard of him. If you must have him, then get him for your Avengers, Hulk, Fantastic Four and Pym family (being the lovers of Jocasta).
  • Does it need a remake?:
    • No.


Below you will find a gallery of suits that still need to be made. I have included what I think are the possibilities of them being made. Note that these are my personal opinions and not fact. Please let me know if I have missed anything.


Universe: Prime Universe (Earth-616)