Otis Technology AP Brushes - 50 Pack Bronze Small. The Bronze All Purpose Brush gives you the ability to scrub hard to reach places where carbon powder and copper residue build up and is ideal for cleaning the area around the firing pin. Specifications for Otis Technology Bronze AP Brushes: Manufacturer: Otis Technology Quantity: 50 Color: Bronze Fabric/Material: Bronze Caliber: Universal Features of Otis Technology Bronze AP Brushes Double ends allow for large surface scrubbing on one end and precision cleaning with the smaller end. Removes fresh carbon or powder residue but won't scratch your firearm finish For everyday use and can be used on virtually any surface including wood surfaces Nylon bristled brush meets Mil. Spec Package Contents: Otis Technology Bronze AP Brushes 50 Bronze All Purpose Brushes Otis Technology IP-316-BZ-50: AP Brushes - 50 Pack Bronze Small