Re: PTR91's
Got one that I have put about 1000 rounds thru. Fit and finnish are great, best HK clone that I have seen. I have never been a fan of the rotating drum rear sight and that is one thing I don't like about mine plus it has a adjustment knob on the right side that is awkward and looks like it could be broken off easily. Magazines are cheap and plentiful, 1 to 5 bucks depending where you find them. As stated above, it does tear up brass.
I don't like the charging handleup by the gas tube. I know some guys that rub 550 cord thru it to give them some extra leverage should they need it. Very reliable, works good, like the delayed blowback operation system. Doesn't work great in
fine sand, but not much does. My 2 cents.