There's no easy way to scrape carbon out of the star chamber of an AR-15 unless you're a surgeon. That's why most shooters use a star chamber brush to loosen the carbon, then remove it with a star chamber cleaning pad and a healthy dose of solvent. Done deal. Now go back to shooting. Features: 20 wool chamber pads per package Overmolded rubber contact points to protect firearm finish Rubber-backed magnets Removes loosened carbon from star chamber