Question for you experts, I was cleaning my new J&T 16" Carbine today and noticed that the alum. Buffer had little indintation marks all around the face of it where the bolt carrier contacts it. Is this normal,I did lube the buffer with moly lube before inital firing,even this contact point! The marks remind me of knurling.

It is a Bushmaster lower.Thank's for the quick reply j3,i'll ck that out!

I had EXACTLY the same thing happen with my Bushy Superlight.  The cutout on the carrier did have a little flare out from machining.  Just from breaking open the gun it scratched the face of the buffer.  Took a file to the tail of the carrier and ended the problem.  It might have looked small but if you have had a run in with a baby's fingernail it does not take much to make an impact.  Just bevel the cutout opening a hair.  Happy shooting.

Thx gent's it was indeed the cutout,as it had a bur all the way around it,and the little cuts didn't go out to the edge of the buffer. Polished it down with a cratex wheel on a dremal.Thx again for the info,this is a great forum!