Breakthrough Clean Technologies® Phosphorus Bronze Bristle Bore Brush - 20 Gauge Product Features • GUN CLEANING BRUSH: This 20-gauge bronze bore brush features a #5-16-27 thread, rugged brass core and stiff bronze bristles to attack heavy carbon build-up in your firearm. Our gun brush is a handy accessory to add to your shotgun cleaning kit. • BRONZE BORE CLEANER: One of the best things about our gun brushes is that they don't scratch when cleaning and maintaining your guns. It's crafted with a
