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Black Spots on a Stainless Hammer

1K views 6 replies 4 participants last post by  Krazeehorse 
#1 · (Edited)
I purchased a new stainless TLE/RL a couple months ago. I've put around 700 rds though it. Cleaned and oiled it after each range session.
I recently noticed a number of small black spots on the sides of the hammer. I tried some Hopps #9 and a chamber brush, but they are still there. Is this some kind of corrosion? If so, I'm curious if it's is a common issue? Thanks.
 
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