My main 92 training gun was a real QC nightmare. I bought it at peak 2013 gun hysteria so I could have a beater to practice DA/SA.
The frame and slide were milling themselves at the frame rails...as in the slide was tilted about 0.05 degrees left or right of the frame vertical centerline when looking down.
The thing amazingly worked. It still works.
The other machining on the slide is reminiscent of the other pictures. It looks like a Ruger.
It looks to me like the TN plant still has some teething issues.