Remington formerly Bushmaster SQUEEG-E Bore Cleaner 44 -45 CALIBER , just swab gun bore with your solvent and with your brush , then run another swab thru and then just pull this SQUEEG-E threw bore and your all clean , FAST SIMPLE CLEAN BORE IN A FRACTION OF THE TIME IT USE TO TAKE / WE NO LONGER SHIP WITH USPS , they lose packages to often