Ultimate Arms Gear Gunsmith Cleaning 10 pc Pack Double Ended 7 " Brushes Kit Set - .223 5.56 AR15 AR-15 AR 15 M4 M16 Gun Rifle 10 Pack of Gun Cleaning Double Ended Brushes. Soft Nylon Bristled Brush to Prevent Scratching on Gun Parts. Best Brush in Cleaning Those Hard to Reach Places. Clean the Tinest of Debris from your Gun.