Robert Hillberg (August 27, 1917 – August 12, 2012) was a firearm designer and the head of Research & Development at the High Standard Manufacturing Company.
His designs included the folding shotgun stock, the Whitney Wolverine, the Wildey .45 gas-operated pistol, and the four-shot COP 357 Derringer.
Hillberg developed a variety of insurgency weapons, primarily multiple barrel shotguns, which could be covertly distributed to partisan forces fighting in the United States' national interests.Gun Digest editors have described Hillberg as a "national treasure."