FNG here. Purchased my first firearm (AR-15) recently. After the first range trip I decided to learn how to clean my weapon. Did a fair amount of research and video watching but apparently attention to detail is something you can't always teach as I took a chamber brush and ran it through the barrel 3 times before noticing what I did. Did I ruin the barrel? It's chrome moly btw. Appreciate any feedback and welcome the heat as well, I definitely earned it.