Bluish-green patina on suppressor/mount

[1168]

Is there any harm in not removing it? I have it on both suppressed and non suppressed guns but never thought anything of it.

Not sure about the CQB, but on the NT4, I always just scraped it when it got really thick and looked like it was filling in the grooves. Unsuppressed guns, I just leave it.

[odugrad]

I see this a lot. Never put much thought in cleaning it off as it doesn't seem to effect performance. Plus, most of the places you'll find it are difficult to clean.

[MegademiC]

Verdigris is a mix of copper compounds
Copper solvent will remove it.
You didnt see it until it sat because it was a thin layer of copper, then it reacted and is now vertigris which is much more visible.

[og556]

Does it hurt any thing to just leave it alone when this happens? I’ve used a brush to knock off heavy accumulation but the thin layer on the surface of the mount I normally clean off with clp.