The Otis system is a decent enough field cleaning product and for a quick dry scrubbing while the bore is still warm after shooting (makes cleaning at home faster and easier). At home, I would rather use a quality cleaning rod. As previously mentioned, the extractor claw is a bit of an annoyance for chamber to muzzle cleaning but not an issue if you go muzzle to chamber, no longer a problem. Not the preferred method but better than snagging your bore snake, rip cord, or chewing up your cleaning rod.