rust on a mossberg new heaven 250 semi
I was given a mossberg new heaven semi auo rifle. Checking rifle was empty "I locked n loaded"still empty it worked ok. My question is this
The barrel has rust on it, Question is the inside of barrel rusted too? Is there any type of gun cleaner best for removing rust?
More to the point once cleaned will my mossberg new heaven ever be safe to fire or will it just mounted on a wall?