Here are some photos showing wear on the striker/firing pin and FP safety on my ex-PD Gen 3 (made Feb., 2004)
G22C. I presume the gun has seen considerable use during its time w/the department, and I also presume it was properly maintained during that time as well.
I have yet to fire it so the wear/damage was something that occurred previously. The gun was spotless when I received it, but who knows what may have happened prior to that.
BTW, the wear shown is all but invisible to the naked eye. It wasn't until I noticed something by feel
that I used a 10X jewelers loop to see the wear. My guess is, this may be more common than some may think- and if you haven't used magnification to inspect yours, you may be in for a surprise!
BTW II, the incorrectly installed FP spring/spring cups has been corrected
I can see the "chattering" theory, but I have some concern about the raised/deformed metal on the FP being considered normal.
Actually, I don't see how a gun in proper time could even cause the safety and FP to collide like mine has. In any event, I plan on taking the gun to Smyrna to have the Glock armorers take a look at it, I'll post the outcome.
The FP after being cleaned up is below. I used stones and a Dremel polishing wheel- the wheel was too large to reach into the tight recesses, thus the two-tone appearance: