I've got a Glock 23 Gen 4 that is my conceal carry weapon. I disassembled it this evening for a basic cleaning, and I noticed a scuffed up part on the inside of the frame. The part in question has a flat spot on the front, but the top edge of it appears to have some damage that has put a small knick in the plastic. When assembling the slide back on the frame it appears that the slide can make slight contact with that piece causing the knick (if assembled slowly and with attention the slide will avoid the spot).. I have only fired 25 or 30 rounds with this gun, so I am unsure if this is normal wear or if I should be concerned. The gun appears to accept and eject dummy rounds as it normally should. Thanks in advance for any information.