phosphate coating my AR barrel. help please?
I recently finished my first AR build, which included pinning and welding a compensator to a 14.5 in barrel. I wanted to re-phosphate the area I welded but was concerned about the phosphate getting inside the bore. I was wondering about how to plug up the bore as to avoid getting the finish in there when I dip the muzzle. I was considering using clay. Anyone have experience with this?