Thread: Advice needed, I"ve got the pits!

I suspect your suppressor does not have a barrel isolator tube but just seals on the barrel ?
The corrosion / pitting is caused by carbonic acid forming from the CO2 and water vapor from combustion.
If the barrel does have an isolator tube then somehow the acid is getting between and onto the barrel
Something needs done to stop the acid getting into the wrong place first before anything else