Unproduced "Two-Ups": Replicators
Before action figures are molded in their normal size, sculptures and prototypes are regularly made of the figure at twice their normal size. These prototypes are called "Two-Ups".
Pictured above are "Two-Ups" of the Replicators. Derived from the Star Brigade line, the story behind the Replicators was that different characters were to become hosts for intelligent aliens. These figures were intended for release in 1995 but were cancelled when the G.I.Joe line was cancelled in 1994.
The characters pictured above are (from left to right) Cobra Commander, Destro, and Gung-Ho (with his helmet on).
Images Courtesy of: Simon Hurley