nitesite Average Guy Moderator "Philanthropist" Jul 22, 2014 #2 It sure looks like something other than rust.
MikeD I'm Your Huckleberry Staff member Administrator Global Moderator "Philanthropist" Jul 23, 2014 #3 Not sure, but I would contact them about it.
Gronk .410 Jul 29, 2014 #4 I had a similar issue with my 590A1 with the Marinecote finish in the same spot on the barrel ring, they replaced my barrel and receiver under warranty
I had a similar issue with my 590A1 with the Marinecote finish in the same spot on the barrel ring, they replaced my barrel and receiver under warranty