I bought one recently very cheap, the guy advertised it as the original Czech caliber 7.62x45, and he said he never shot it. So I bought a hundred rounds of the Czech surplus ammo for $65 dollars to try her out but when I brought it home and tried to chamber a round it would not fit, come to find out it shoots 7.62x39 Russian, I was happy and mad at the same time, mad because I bought ammo I can not even use, but happy it fires the cheap Russian round
The guy probably would have sold it for more if he knew it shot 7.62x39, I think it has one of those barrel inserts so you can shoot the Russian round because nowhere on the rifle does it say it was converted, it has the original Czech caliber on the barrel