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The CBJ-MS is a submachine gun designed by Swedish arms developed Carl Bertil Johansson, perhaps better known for his remarkable armor-piercing 6.5x25mm CBJ cartridge. He developed the gun at about the same time as the cartridge, on his own time while working at the Carl Gustafs factory in Eskilstuna. While it bears a lot of visual similarities to the Uzi, and it is an open-bolt simple blowback action, it has a unique and clever fire control system – and several other creative features as well.
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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!





