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Old 01-15-2019, 04:14 PM
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Originally Posted by longislandloco View Post
the anodizing tends to rub off quickly at the ejection port
Anodizing should not be equated with oxidation finishes applied to anodized aluminum. The finishes rub off, some very easily.

You will see pics of VN era M-16s that appear to have no residual finish. But the underlying anodizing is just fine. Certainly, you can drill/grind/cut your way through it. But that's not what you're seeing on those Benelli ejection ports, unless shell rims have been coated with lapping compound.

Similar confusion exists with respect to nitrocarburized steel. Most always it's just finish that wears, with zero loss of nitrocarburized metal.
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