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Courtesy of CZ and their reference library, we are looking at a prototype model of the vz.70 pistol intended to use a suppressor. It has an extended and threaded (with interrupted threads for quick attach/detach) barrel, and a mechanism to allow for locking the slide. This will prevent the slide from cycling, thus reducing the noise of a shot and also preventing the ejection of spent brass. Ultimately only a handful of these were made, and they never got into production or issued use.
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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!