Green in gas block?

[karl9422]

I was cleaning a buddys gun for him and in the golt there was green where the carbon. it is also inside the flash hidder. is this from lack of lube? i hardly every cleam my rifle maybe once a year i do it and i have not seen green inside it. i always run my gun wet with clp.

[sevensix2x51]

if you were using a solvent with patches, you might have been clearing out copper fouling. i have some solvents that turn copper green when dissolving it. sometimes blue, also. at least, i think i remember its copper that does that...

[Merc1138]

green/blue is from the various forms that copper has oxidized into, or been converted to with a solvent.

[karl9422]

This was only in the bolt and the flash hider I did not clean the gun at all so it was just the from an inspection. It was also not in the barrel

[karl9422]

Is there any way to provent this from happening? its a pain is the a** to clean i have found out