The Hillberg carbine was a light rifle concept for the US armed forces during WW2. It featured a gas-operated operation that moved the barrel forward rather than the bolt to the rear. The layout of the rifle was later used in the Whitney Wolverine pistol.[1][2]
^"The Oldest Name in Guns Comes Back" (PDF). Guns Magazine: 24–27, 66–69. August 1956.
^Card, James (4 September 2012). "Robert Hillberg, 1917-2012". Gun Digest. F+W Media. Retrieved 19 June 2014. History will surely remember Robert L. Hillberg as one of the foremost firearms designers of the 20th century.
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