This collection was reportedly limited to 504 pieces each which may or may not also include production samples from cases such as those seen here: https://www.megocollector.com/action-figures/galoob-ultraforce-asst-75596/.
These 5 figures were intended to be produced in quantities of 5,000, but Galoob canceled the line and stopped production before these made it to 5,000.
UltraTech scientists tatooed implants under the skin of Jimmy Ruiz, turning him into a deadly rocket… and an Ultra superstar. With PROTOTYPE armor making him stronger, faster and deadlier than ever, he became UltraTech’s spokesman after winning a video game competition.* (*See PROTOTYPE Comic Book #2. –Ultra Editor)