This is an unfired 14.7" FN barrel, PSA upper.
Not just a couple of spots but all throughout the barrel.
I was checking the gas port alignment, which was fine but it looks like the plating process didn't go right with this one.
Got an RMA and it's going back, if the replacement looks like this one I'll just get a refund and be done with it.
Sure don't look like my CL .308 barrel that has around 1,000 rounds through it.
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