As the title suggest I purchased this Urika 2 6 months ago and out of the blue I decided to give is a cleaning.

This is what came off the barrel after wiping vigorously for about 15 secs with clp. I can't imagine it being rust as I store the firearm in a climate controlled area and clean it after every field use but well that's why I'm posting. Is is some sort of lube from the factory perhaps? Or do i have too much clp / g96 on the barrel?
There is nothing visible on the barrel it's just nice and shiny as I keep my stuff lightly oiled at all times.
Suggestions?

This is what came off the barrel after wiping vigorously for about 15 secs with clp. I can't imagine it being rust as I store the firearm in a climate controlled area and clean it after every field use but well that's why I'm posting. Is is some sort of lube from the factory perhaps? Or do i have too much clp / g96 on the barrel?
There is nothing visible on the barrel it's just nice and shiny as I keep my stuff lightly oiled at all times.
Suggestions?