Back in the 1980s a number of them were imported in to the USA from Red China these were, as far as I know, rechambered/barreled for the 9mm Parabellum cartridge, or at least the one my father bought was/is so chambered. I have inherited the gun, along with its wooden holster/shoulder stock, I've not fired the gun since I inherited it and my memory of our outing with it is a bit fuzzy from the years pasting, but I recall us having, initially, failures for the bolt to fully close on chambered rounds. A slight shove would finish the bolt locking up and the gun firing and ejecting the fired rounds, as the magazine was emptied the problem would be less frequent, indicating to dad that the recoil spring was weak, dad obtained a replacement spring, it is with the gun or maybe it is the in the gun and the old spring is in the case with the pistol. In any case I have the gun and two springs. The other thing I recall is that the pistol hit about 6-8 inches high at 10 to 12 yards, now this could be due to the sights being originally set for the .30 Mauser/7.63 Mauser and the gun having be converted to 9mm, or possibly the result of someone reducing the height of the front sight blade. In any case at some point I will get a gunsmith to check out the springs and then figure out how to regulate the sights.
Otherwise I remember it was quite fun to shoot, when it was cycling, especially from the shoulder with the shoulder stock/holster. But with its bore axis running so high, compared to my Browning Hi-Power, the pistol bucked a bit.