CleanShot® by Huntego. The only “shoot-through” gun bore field cleaning product of its kind — it’s fast, effective and ultra-convenient compared to traditional cleaning methods. Simply load like a standard round and safely fire. Designed to be used in the field or at a range, CleanShot lets you maintain your firearms with minimal effort — yet delivers the confidence that your firearm will be field clean and ready to perform when you are. CLEANSHOT ADVANTAGES – CleanShot power scrubs the bore, traps particles and wipes the bore clean with each shell – CleanShot is affordable and easy to use – The fastest means of field cleaning your firearm barrel – Use CleanShot after recreational shooting, trap & skeet, target, hunting, law enforcement and military applications – The CleanShot technology platform is secured by a portfolio of utility patents within the US and international bodies
They retail for $9.99 over at huntegoltd.com