You mentioned firing pins on the CZ-52. I would strongly recommend anybody who is considering purchasing one to get spare firing pins. They can break in a single instance of dry firing. There are after market, hardened firing pins made however that make the problem a moot point. I can’t remember the sources off the top, but google should bring something up pretty quick. :-)
What’s that company? J&T arms? They send out flyers. They have the CZ52 pins.