I don't think it matters what you use to clean the insides of a gun with as long as it is clean of residue before you oil it with a good lubricant before you put it back together. I cringed when someone mentioned brake cleaner. You spill that on a gun stock and take the varnish off of a gun stock and it would be something to regret. Mine came out just fine brushing it with a gun cleaner and final finish of Clenzoil. But-to each his own. Good luck.