I purchased my G23 from my best friend since he had duplicates. When I completely stripped the slide for cleaning I noticed that the striker (firing pin) is plated with a very low friction coating. The coating was flaking off on the end that strikes the primer like chrome sometimes peels off steel. I also noticed that one of the stepped edges of the striker looks excessively worn. I'm assuming this is where a safety mechanism rides to prevent release should the weapon be dropped. Is this common? Was it caused by excessive dry firing? Should I be worried and replace the stiker? Is this typically a waranteed item? A lot of questions, but I'm new to Glocks. Thanks.