Re: zastava m57/ tokarev 7.62x25
It is much simpler to make a barrel for a Tokarev than for a 1911, the designer went to some length to simplify manufacture. Since I have no means to do the rifling, my solution was to cut a 8 in piece off a Shilen .308 barrel blank and machine away the metal that wasn't part of a Tokarev barrel. This worked fine, and my 1941 Russian is now very accurate, but there at several companies that make an almost infinite variety of barrels for 1911s and others. But as long as the main reason for these guns is to be able to shoot a large variety of overage Eastern European surplus ammuniton of original quality ranging from fairly good to awful, those companies won't be interested in supplying good Tokarev barrels, and the original manufacturers didn't seem to be very interested in barrel quality. The only ammo I shoot in the new barrel is handloads from Starline brass and Sierra bullets. New S&B would be OK but it is more expensive.
If quality is not an issue, then these pistols are just surplus military junk, some of which is usuable.