I posted my reply well before Ted posted the pic. That's NOT operator error... but I have never heard of Repros doing that before this thread.
And I've only owned 5 or 6 Repros...
The world is full of surprises.
I have maintained across about three different threads on this topic that I do not believe this is an epidemic. I believe that the material that Winchester model 21s are built of, which, is 4140 Chromoly, is difficult to wet in a soldering operation, and, as a result, they pop ribs and for-end loops regularly. Perhaps there is an issue with the steel the Repops are made of that causes something similar, but, brazing a lump back in place is going to be far more traumatic than silver soldering ribs or a loop in place. There exist many Parker repros that have been at work for years and have no issues. I will say that the single trigger delivered in the Repro needs to be worked on most of the time, from what I have seen. That might be more of an opinion, but, the single trigger is usually a bit crunchy. But, that is a relatively easy fix.
I have seen three Parker Repro guns with this issue. It gets your attention the same way seeing a bad wreak happen does, and leaves a pit in your stomach for the guy who owns it and a big question on how much a repair will cost, or, if it is even feasible.
Best
Ted