Thats interesting. I have a work Gen 4 G17. Out of the 20 or so others, as well as mine, have some issues.
The gun functions flawless. The grip texture...ehh...not a fan. The slides rust constantly no matter how much you clean them. The slide finish is VERY thin. It has worn through quickly where my Gen 3 G26 that belongs to me and also get carried a ton, shows no wear from a kydex style golster.
I think Gen 4 had quality control issues and instead of fixing them, they just discontinued instead.
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