First appearance as American Son: The Amazing Spider-Man #598
The American Son armor was originally created by Norman Osborn for his son Harry Osborn. Harry temporarily wore the armor and title to fight his father to save Spider-Man and free himself of his father's hold once and for all.
First appearance as American Son: Age Of Heroes #2
The armor can only be worn by someone with Osborn DNA. Gabriel Stacy who is also Norman Osborn's son breaks into Norman's laboratory and places the contents of his lab into a moving truck. He later wears the armor and begins fighting crime throughout the city.