Blunderbuss623
Member
- Joined
- Apr 7, 2021
- Messages
- 28
So I got this Remington 870 Express Tactical and the outside of the Barrel has this brown discoloration to it (See Photos). You can see the contrast in color from the mag tube and the barrel. Leaves a slight brown tinge when I clean the outside of the barrel. I've put prob 500 round through it and cleaned it multiple times but the coloration remains. Don't know if this is some kind of grease or cosmoline or grease from the factory or what. Never seen rust like this, this is almost a copper color. So, what is it? What can I do about it? Do I even need to do anything about it? Does it even matter?