So I’ve got a new psa pa 15 16 inch carbine. My first actual ar15, (yes I know it’s not a super nice one) any ways it’s way overgassed so I got an h2 buffer weight for it. It was over running the mag a few times. My specific question is in the charging handle channel, right where my gas key rides, the anodizing has been worn through after a couple mags. I was under the impression the gas key or carrier key isn’t supposed to contact the upper there. The only contact points are the bcg rails (or so I thought)