True, it is aluminum oxide, but it's more a dusty film than anything like sandpaper. Treat them with gunoil and you won't have to worry about oxide forming.
Hehe, sounds like you are set, you knew what I was talking about. Actully with mine, I took a small pill bottle, put in some .22cal patches, a couple screw driver heads for my rifle, and put it in the location meant for the bottle of oil. And also put in a small flat screw driver handle where the chamber brush is supposed to be. Wish there were string ties on the thing, I just used some paracord to hold it all together. Everything fits in my M24's stock pouch.
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