CLP ie the Breakfree I used back in the day while in the Army when used on rifles is only effective with a chrome lined bore who's super smooth surface doesn't really collect copper from the jackets. ATF works as good as anything out there for cleaning powder residue. For lube ATF containes high pressure additives. If it's good enough to keep a manual trans or 4X4 transfer cases running smoothly it is good enough for a pistol slide. a qt bottle will last you the rest of your life.