World’s Fastest Gun Bore Cleaner. Simply a Better Way to Clean Rifles. Brushes and swabs bore in one quick pass. Built-in bore brushes. 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.