So is this just carbon or is it corrosion? I've heard of

File: IMG_4357.jpg (1MB, 3264x2448px) Image search: [Google]

1MB, 3264x2448px

Another view

File: IMG_4358.jpg (2MB, 3264x2448px) Image search: [Google]

2MB, 3264x2448px

Last one

>>32189028
FINGERPRINT SCANNED....
LOCATING SIGPOSTER......
Try scrubbing it with a Scotchpad with your selected weapon cleaner.

Maybe you clean it first.

If is just a little surface rust get a little copper brush and oil.

If the barrel is pitted and nasty buy a new barrel.

>>32189028
Looks kind of like cooper, you haven't been using copper brushes and solvent like Hoppes, right?

>>32189112
Not mine actually. A buddy sent me the pics asking. I know slightly more about guns than him, and I assume you all know more than me.

>>32189028
Don't worry about it. Just clean and oil like always.

If you plan to store it for a long time (1yr+), grease it up as you would with any firearm.

Shit dude. That's cupric intrusion. The copper in something you're using is bonding with the nickel to form cupronickel. Known since 1965 as a massive source of immediate devaluation.

>>32189028
>Sig Sauer Exeter
Get the name right and be proud of your "Made in USA"

>>32189112

Lol hilarious troll post, sorry to ruin it for you. But I had to let you know how funny it was.