Quote:
Originally Posted by mac1911
That strange "fiber" looks more like a flaw in the alloy of the steel ? Maybe send a pic off to Criterion and see what they say?
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It's not a fiber, it's like scale residue. I assume from shooting, although it's only had commercial .308 ammo through it. It's only in one area just at the rear of the front handguard in 2 of the grooves about 2" long. If it doesn't come out, I will give Criterion a call.
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