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The Zastava M51 is a prototype Yugoslav submachine gun developed before the adoption of the M56. It uses elements of the Beretta M38 (namely the captive recoil spring system) and PPSh-41 (the selector switch and magazine well) along with a collapsing stock reminiscent of the Polish PM63 machine pistol. Documentation on the M51 is very limited, and I don’t know
many were actually built, but it never went into series production.
A big thanks to the Croatian Police Museum (Muzej Policije) in Zagreb for giving me access to film this rare piece for you! Check them out at: https://muzej-policije.gov.hr
0:00 Introduction and overview of Zostava M51
0:25 History of M49 submachine gun and its adoption by Yugoslav People’s Army
1:05 Detailed examination of M51’s key features
2:48 Disassembly and close inspection of M51
3:53 Markings and historical significance of M51
4:52 Potential usage scenarios and tactical value of M51
5:22 Evolution from M51 to YUGO M Fifty 6
5:47 Discussion on the rarity and documentation of M51
6:06 Conclusion and appreciation to Croatian Police Museum
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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!