There have been many reports by people that import, sell, modify and promote "Turkenelli's" saying that they don't all come from the same place and that the quality varies.
It seems to me that most of the producers have issues and some don't, I'd guess James "aka" the turkish gun hater didn't bother to try and figure out who makes a good one and just went for it with semi predictable results.
I tried to buy 2 of these guns but returned both without firing a shot, first becuase the sights were canted off to one side a few degrees and the second because the picatinny rail was not in line with the bore which bothered me.
Both were bought through S&J and the second one was supposed to be by the best producer available and an improvement over the first batch they brought in.