Pro-Shot Total Fouling Removal Brush Nylon Kit- .308 Cal / AR10. 308 Cal. Rifle TFR (Total Fouling Removal) Kit for the AR Platform Rifles (.30 Cal. / .300 AAC Blackout/7.62mm) is made with black heavy duty long lasting nylon bristles. These brushes were made specifically for removing heavy fouling from your rifle and built tough so they can be used repeatedly. Fits Standard American Cleaning Rod with #8-32 Threads. Specifications for Pro-Shot Total Fouling Removal Brush Nylon Kit- .308 Cal / AR10: Manufacturer: Pro-Shot Caliber: .308 Winchester Included Accessories: Brushes Gun Type: Rifle Package Contents: Pro-Shot Total Fouling Removal Brush Nylon Kit- .308 Cal / AR10 Pro-Shot TFR-AR308: Total Fouling Removal Brush Nylon Kit- .308 Cal / AR10