I have a mil surp M57 and a CZ52. Both are a lot of fun to shoot. I have grip sleves on both, which makes then easier to hold on to. I have everything to reload 7.62x25 when I run out of mil ammo.
I have a surplus M57 also and I liked it so much I bought a Norinco so I could steal the barrel and shoot 9mm out of the M57. Now maybe I can afford some extra new M57 magazines.
I love my CZ52. replace the firing pin (they are known to be cheap. Fresh sturdy ones are on line for cheap enough. Check the mags though. To many are screwed up from guys over the years using the mags as disassembley tools. I love the TT but the new Serb ones I have not anything good about them. Love the 7.62 report and fireballs.