Fowling at muzzle?
I only shoot non-corrosive out of my wasr-10/63, but it seems that there is a soot-like residue that builds up right at the muzzle underneath the muzzle brake.
Someone want to take a snapshot of their wasr muzzle (sans brake) just so i can see what looks normal?
Mine does the same thing. It's like the bolt on an AR, you just have to scrape a little to get it off....
you can use a spent .45ACP casing to scrape it off if it bothers you. But otherwise, just leave it since it does no harm.
That .45 case works well on AR bolt niipples too. But again, not really necessary.