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Zastava M51: A Compact Yugoslav Prototype SMG

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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:

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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