

When I first got my Tikka T3 Varmint .223 i gave it a good cleaning, this is what came off the reciever. There is none of this on the barrel. No matter how much I cleaned it, there was always more. Now a few shooting trips later it's still there everytime I clean it... What gives? Suggestions on getting it off of there, being that no matter what I do more comes off every time I wipe it down? Will it harm my rifle in time? Is it even rust?
I know these are noob questions but bear with me, I feel like a worried parent.




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