I've put together my first AR lower and have a question on it's finish. The lower had an almost chalky black finish when I bought it. It's a PSA lower. Everything went together well and I'm happy with the quality. I was wondering if I should rub it down with a light coat of gun oil. Is that an "old school" way of doing it or is there something else I should do?
Thanks,
John
Thanks,
John

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