AN EASIER, FASTER WAY TO CLEAN A SHOTGUN BARREL. Browning Shotgun Pigs are polymer cleaning jags — like nothing you have used before. Each pig is color-coded by gauge for easy identification. They withstand all common barrel cleaning solvents and oils. Attach a fabric patch to the pig with the magnetic end piece and drip on the solvent or oil of your choice. Push the patched pig through the barrel. Very easy! The perfect fit cleans like no other system ever.