[hivel9mm]

Finally, what your barrel shows now is of absolutely no concern. You could fire another thousand rounds and not see any difference. So...don't get too hung up on seeing those deposits.

Since the copper fouling is mainly cosmetic and has little effect on your barrel and its functioning, you could just skip the copper solvent altogether and save yourself some time and money.

If the cosmetic appearance of your barrel is important to you, then go ahead and try a copper solvent like the one Mike-M uses.

 

[hivel9mm]

Do you have any information on whether the copper fouling has any effect on the newer Glock Marking Barrels?

I wouldn’t think so, but it would be interesting if it did.