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I use this after I shoot my hand guns, shotguns and rifles. I spray them down real good and it helps in a pre clean until I get home and then break down the weapons for a real cleaning.
You can purchase this product at the following web site along with several other products for your personal vehicle oil change.
www.lubedealers.com/drmartin

Cuts through rust and frees frozen components
Protects against rust & corrosion, even in salt water
Prevents rust and corrosion, even in salt water
Displaces water
Stops squeaks
Clean—Leaves no film
Sprays into hard-to-reach places
Protects electrical equipment
*Ideal for firearms and other fine componentry *