Hi everyone,
Forewarning: I am quite new to firearms (5 months) and am still unsure about a lot of things so I would really appreciate it if someone can help me with this.
I bought this Miroku Mk10 last weekend from a bloke and when I looked it over she looked great. Afterwards I went out to the range and shot it straight away. I forgot to clean it afterwards and only got around to it now.
Theres some discolouration on the action side of the barrel, which you can see in the image below. I tried scrubbing it with a brass brush and some G96 but not all of it came off.
Is this something I need to be worried about?
Cheers, Nick