Hoppes Boresnake 12 gaug
Hoppes Boresnake
The fastest bore cleaner on the planet.
One pass loosens large particles, scrubs out the remaining residue with a bronze brush, then swabs it all spotless with a cleaning area 160x larger than a standard patch.
Add a few drops of lubricating oil and your gun's ready for storage.
The Boresnake is machine washable.