Yes. What CMA says it the truth! Keep the ferrous parts covered with Birchwood-Casy SHEATH (BARRIER). Spray iton the metal parts when you get ready to go hunting, and swab the gun's metal parts with it after you get home. After cleaning the bore & chamber, swab out the bore with a patch saturated with it. The stuff dries quickly, leaving a microscopically thin coating of the rust-preventing chemical barrier in the pores of the steel.

I used it for theree years of hunting in coastal Alaska with blued steel guns,where it is foggy and rainy all the time and the air is full of sea salt. Never had any rust or corrosion on my guns. It does NOT change the bullet's point of impact like oil can. So you don't have to clean it out of the bore before shooting.