I just acquired a glock 36 that had been sitting in it's box in a pawn shop for the past ten yrs. This barely used 36 functions perfectly so far. Out of curiosity I checked the serial and it appears this EUM serial glock was included in a recall due to a frame issue according to Glock. They offered to fix gun but would swap out frame for new. I would prefer to keep the gun with matching numbers if possible. Does anyone remember what the problem was specifically? Thanks!!