Big Rock Sports 24011 Bore Snake Rifle Cleaner, M16 - .22-Caliber Multiple short brushes embedded in the floss pass easily through the shortest action or port Initial floss area (inside the barrel) removes loose grit and debris prior to the scrubbing action of the brush Main floss, with 160 times more floss than a patch, super cleans the bore Brass weighted drop-through cord slips easily down barrel, Grasp and pull the cleaning cord through the barrel Washable and reusable