For the K-50M, the heat shield was shortened some three inches, exposing more of the barrel. The original wooden stock was given up in favor of a metal receiver coupled with an extending/collapsible twin-strutted wire butt, its design taken from the French MAT-49 submachine gun. The loss of the wooden stock also introduced a stand-alone pistol grip handle with integrated trigger group. The muzzle compensator was dropped and a barrel-mounted forward sight device installed. Beyond these changes, the weapon system remained true to the Chinese Type 50 and truer to the original Soviet World War 2 PPSh-41 model series - save for a few external changes and additions to produce a more localized submachine gun offering.
Specifications for the K-50M include an overall length of 29.5 inches with stock extended, a 22.5 inch overall length with the stock collapsed and a weight of 7lbs, 8oz. The chambering remained the widely-available 7.62x25mm Tokarev Soviet pistol cartridge and the action blowback with an open-bolt design. The submachine gun held a rate-of-fire of 700 rounds per minute with a muzzle velocity of 1,600 feet per second from its 35-round detachable box magazine. The box magazine was wholly faithful to the original PPSh-41 and completely unchanged.
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