Kimball .30 Caliber Carbine Auto Pistol

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Less than 300 of the Kimball .30 Caliber Carbine Auto Pistol were produced back in the 1950s. The operating system is fascinating. It is straight blowback, but upon firing the case expended into a ring machined into the chamber. The slide was force to swaged the case back to shape in order to extract it. In theory the swaging took long enough for pressure inside the chamber to drop to safe levels. Extracting a squib round must have been a quite a process!
Mr. Bruce Dot Com quotes the Canadian-Firearms Digest V1 #851 …
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