I took my firing pin assembly out of my bolt last night. Holy moly, it looks like it was sitting on the bottom of my septic tank. Might be the reason I was having so much trouble in the cold. I wiped it off as best I could and now I want to go further. What do you all think of putting it in my sonic cleaner? Will it hurt it? Has anyone tried it? I guess I just don't know enough about the RCBS solution. I know it states it cleans gun parts as well, I just don't want to ruin a firing assembly to "try" it out.