I think I posted a similar concern some time ago but I'd caught it before the bolt came apart. Today the bolt came apart in my boy's hands while we were hunting ptarmigan. He shot his very first ptarmigan and after looking for more, I think he was unloading the gun while I stowed his bird. All of a sudden he says the bolt came apart - I didn't see what he had done but he had all the parts in his hand. Very lucky we have a very hard crust on the snow right now. Some how the safety button had worked up and out of the bolt. The pin base of the safety holds the whole bolt together. Rather a marvel of simplicity and not too hard to reassemble. But for it to come apart is very disconcerting. If it had been fall and we were in tundra or hunting out of our boat - as we often do- the parts could have been lost forever. Same if the snow had been soft and deep.
I have sent a similar note to CZ USA but I'm open for advice on this issue.
I love this tough little gun but this really shakes my confidence in it. I've never had any other gun come apart in the field like this. I'm sure my boy (11) might have been a little rough on it in his excitement for his first ptarmigan but he shouldn't be able to make it come apart that easy.