Birchwood Casey 1-2-3 Aerosol Value Pack Kit Gun cleaning made simple. 3 easy steps to clean your firearm: dissolve, clean and protect. First, use Bore Scrubber to dissolve copper fouling and residue left behind from firing your firearm. Second, clean out the dissolved material with Gun Scrubber. And, third, cover with Barricade to protect your firearm from rusting. NOTE: THIS ITEM CANNOT BE SHIPPED TO AN ADDRESS WITHIN THE STATE OF CALIFORNIA