Extermineitors III: The Final Fight (1991)

This time, the "exterminators" must confront a secret organization conducting a diabolical experiment: transforming a fighter into an indestructible man through a series of bionic implants. To investigate their scheme, Colonel Morris assigns Guillermo and Héctor Echavarria, but they are joined by Nico, an orphaned boy eager to become part of the Eagle Command.