Have not read all the comments, but why would some idiot try to operate a rusted weapon unless his life depended on it?
The Remington Bushmaster with Tracking Point in .223 caliber. The new thing. Anyone know where they can be bought? They’re around $5k.
However, the damage is very slight, and not easily noticeable from the outside.
Could indicate that it initially looked like a discolored spot or two.