Don't think it matters since he is going to be using WE gas mags unless I am reading his post wrong. He could try the rs pmag mod I suppose. Or does WE have pmags now?
I have found between the anodizing and the metal they use on the 416, the paint comes off extremely easy. Any rubbing on anything hard will scrape the paint off and even dent the surface. It is so bad I am considering getting it powder coated. I am fuzzy on what the M4 has but I think I recall it seemed to have a harder finish on it.
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