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In 1920, Fritz Mann of Germany patented the idea of cutting a shallow ring in the chamber of a pistol as a delaying mechanism. When fired, a cartridge case would expand into this groove, thus requiring more time and energy to push the case out of the chamber and effectively delaying opening. This allowed Mann to reduce the weight of the operating parts of his model 1920 semiauto pistol in .25ACP (aka 6.35mm Browning). The gun was designed to be as small and as light as possible; a true pocket pistol. Thousands of them were made in 1920 and 1921, although he gun failed to see long-term popularity. For more information, I recommend Stefan Klein’s article on Ed Buffaloe’s web site:
https://unblinkingeye.com/Guns/Mann/mann.html
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At Forgotten Weapons I think the most interesting guns out there are the most obscure ones. I try to search out experimental and prototype weapons and show you how they work, in addition to more conventional guns that you may not have heard of before. You’re much more likely to find a video on the Cei Rigotti or Webley-Fosbery here than an AR or Glock. So, do you want to learn about something new today? Then stick around!
