Normally I do not like to "fix" the threads on any high pressure system, I normally just replace it.
However, to me it does not look too bad, but it will be hard to fix if it is that part at the bottom of the threads. I may use some sacrificial tank threads and thread it in and out, removing any burs until it is smooth. Otherwise it would take some tooling that I have no experience using.
+14 years of paintball experience.
Loves double chocolate cookies.