Otis AR-15 Chamber Brush and Mop Set Features The Otis AR-15 Chamber Brush and Mop Set is built specifically to reach the areas standard bore brushes miss targeting the chamber neck and shoulder area of a 5.56 NATO / .223 chamber with a dedicated brush design. Durable bronze bristles are used throughout to break up carbon copper fouling and powder residue without scratching the chamber s steel surfaces. The chamber brush is shaped to scrub the star chamber area around the locking lugs a spot that regular bore brushes typically cannot reach effectively. All components thread onto standard 8-32 cleaning rods making the set compatible with most existing cleaning kits. Rounding out the set is an absorbent chamber mop which wipes away fouling that the brush has already loosened and can also be used to apply solvents CLP or gun oil directly into the chamber area. Together the bore brush chamber brush and mop give AR-15 owners a complete tool set for addressing the parts of the rifle that see the heaviest carbon and copper buildup. Regular use of this set helps maintain reliable feeding and extraction by keeping the chamber free of the fouling that can cause sticking cases. For AR-15 owners looking to go beyond a basic bore brush in their cleaning routine the Otis Chamber Brush and Mop Set is a practical addition. Otis AR-15 Chamber Brush and Mop Set Specifications Manufacturer: Otis Model: AR-15 Chamber Brush and Mop Set Type: Chamber Brush and Mop Set Compatible Hosts: AR-15 5.56mm / .223 Material: Bronze/Stainless Steel Bristles Thread Size: 8-32 Available At: GrabAGun