Interesting about that pin that starts to slide out. I noticed that happen once on my full size P99; I pushed it back in and it has not done it again since, but was concerned enough to call Walther America about it. They advised to call if did it again and they would see if they could come up with some type of fix such as an oversized pin.
I have been wondering about those gunscrubber products I have been using and so asked them about that, if they thought it was a possibility that could be responsible for loosening it up. Stated they did not know, but indicated that if some stuff pooled up by the pin and was not flushed away that softening up of the polymer was a possibility.
My own guess is that the pin is just not a tight enough interference fit in the frame, either due to design error, too wide a machining tolerance or perhaps pin not built/frame not drilled to specs.
I have been wondering about those gunscrubber products I have been using and so asked them about that, if they thought it was a possibility that could be responsible for loosening it up. Stated they did not know, but indicated that if some stuff pooled up by the pin and was not flushed away that softening up of the polymer was a possibility.
My own guess is that the pin is just not a tight enough interference fit in the frame, either due to design error, too wide a machining tolerance or perhaps pin not built/frame not drilled to specs.