Real Avid Bore-Max Bore Brush, Bronze Gun Brush for Fast Gun Cleaning, Nickel Plated Barrel Brush (.243cal / 6mm Rifle) .243cal / 6mm Rifle bore brush: 2x more bristles = 2x more crud scrubbed SPEEDS UP BORE CLEANING process to maintain accuracy, consistency and performance of the barrel MORE SCRUBBING POWER with each bore pass thanks to twice the bristle density comparing to standard bore brushes EFFICIENTLY loosen and remove carbon residue thanks to optimal balance between bristle density and flexibility to successfully reach into lands and grooves LONG LASTING, nickel plated bristles don’t dissolve in a solvent or break down – safe to use with harsh chemicals and last longer than traditional bronze or nylon brushes