The barrel wrench costs 22 bucks and a length of black or PVC pipe is another couple bucks. Slide it over the barrel carefully and you wont scratch the blueing. Get some Brownells oxpho-blue creme formula for any touch ups. We all need to do touch ups once in a while. Once you have the wrench, you might as well take the rifle apart and clean out the shavings that some owners have found. Assemble, tighten, done.