Otis star chamber cleaning tool for.308/7.62mm ar FEATURES-For 7.62mm/AR-10-Quickly & effectively cleans the star chamber in justa few twists-Parkerized steel scraper removes fouling build-up-Felt cleaning pads picks up the fouling loosened by the scraper-Coated brass nose piece centers the tool in the chamber-8-32 threads to attach a chamber brush or other scraper components-Comes with 6 cleaning pads