WWII BORE CLEANER - 6oz CAN Comes in 6oz metal can. Rifle Bore Cleaner. We sell these mainly for the can itself, however many still prefer this cleaner, because of its amazing solvent properties. New old stock. Various mfg. companies. Cans have some rust and pitting and labels are not perfect. some of the oil has evaporated over the years, but we always send out the heaviest cans.