I dont know if any of you have come across this with your guns, but the finish on the slide of my m&p40 doesnt look right. I have always put a light coat of oil on it after shooting, but i keep getting these discoloration spots on the slide. the usually disappear when i first put some oil on it but then the next time i take the gun out of the case there back. i put some pictures hear but it was really hard to take a picture of, so the spots are hard to see.
has anybody else come across this? any idea what i should do or put on it to get rid or them?
thanks



has anybody else come across this? any idea what i should do or put on it to get rid or them?
thanks


