Run Away!
Mine exploded the first time I shot it.
The problem is that the gun did not originally have a disconnector or hammer as it fired from an open bolt with a fixed firing pin. When they converted it, there was very little room in the lower receiver to cram in the new fire control group. They had to bend the rear receiver latch out of the way to make it fit. As a result, the catch was barely holding the gun together.
Soooooo, after about 5 shots, the receiver flew open, the bolt and spring shot out and hit the back wall of the range, the magazine fell out and sprayed rounds everywhere, and I was lucky to be uninjured. The RSO called ceasefire and stormed over to see what happened. I had to gather up the bits and peices of my gun while apologizing to the rest of the shooters.
Later that night, I got a good look at the internals as I was reassembling it. The surplus military parts were well made and finished, however the conversion bits were all rough cast and looked thin and fragile. Honestly, they had to change so much that very little of the original PPS43 remains. I also did not see any way of fixing the clearance issue with the receiver catch, so I sold it back to the fellow I bought it from after warning him of the design issues.
As far as the stock went, mine was not welded, but they had replaced the release bolt with a shorter rivet, effectively fixing it in the folded position, but very easily removed.
However, with the quality and safety problems I found with mine, there is no way I would ever recommend anyone waste their time with one of these guns.
