This Gun Barrell Cleaning System by KNOCKout knocks-out powder and other doubling residue with a quick & easy Clean Gun “two-pass” system. It’s designed for deep cleaning of your .22 caliber firearm (.223 – 5.56 mm or 25-250) The set includes a cleaning cloth and bore brush, and is suitable for use with a range of .22 caliber guns. The system is designed to ensure thorough cleaning of your gun, removing all traces of dirt and debris from the barrel. The cleaning kit is easy to use and is perfect for any gun enthusiast who wants to keep their firearm clean and efficient. Easy to pack in your range bag for simple, quick use after a day of shooting.