I notice last night when I was cleaning my gen 4 17 there were some scuff and scratch marks on the inside of my slide on the left side of the ejection port. The largest scratch is vertical on the slide wall behind the ejector. It looks to me like the barrel has been hitting the inside of the slide in front of the ejector. Has anyone else noticed this on there slide? I tried to take a picture and post with this, but could not get it to come out clear enough.