Breakthrough Clean BT40NBB .40 Cal Nylon Bristle Bore Brush

The Breakthrough Clean BT40NBB Nylon Bristle Bore Brush delivers thorough cleaning for .40 caliber firearms without the aggressive metal-on-metal contact that can damage rifling over time. This precision-engineered cleaning tool removes fouling and debris while protecting the barrel's critical surfaces.

What Makes This Different

Unlike traditional bronze brushes that can leave residue and potentially wear rifling, this nylon bristle design provides effective cleaning action while remaining chemically inert. The synthetic bristles resist solvents and maintain their shape through hundreds of cleaning cycles. Each brush features precisely sized bristles that conform to .40 caliber bore dimensions for optimal contact without excessive force.

Key Features

• Nylon bristles eliminate copper fouling from bronze brushes
• Chemical-resistant construction withstands all cleaning solvents
• Precision-sized for .40 S&W, 10mm Auto, and similar calibers
• Standard 8-32 threading fits most cleaning rod systems
• Reinforced core prevents bristle separation during use
• Non-abrasive design preserves barrel crown and rifling
• Reusable construction for extended service life

This bore brush excels in regular maintenance routines where preserving barrel accuracy takes priority. Competition shooters benefit from the gentle cleaning action that maintains precision over thousands of rounds. Law enforcement and military users appreciate the chemical resistance when using aggressive carbon-cutting solvents. The nylon construction proves especially valuable for match-grade barrels where even minor rifling damage affects accuracy.

Technical Specs

• Caliber: .40 S&W/10mm Auto (.400 inch bore diameter)
• Thread: 8-32 standard cleaning rod threading
• Bristle Material: High-grade nylon polymer
• Core Material: Brass wire construction
• Overall Length: Approximately 2.5 inches
• Bristle Density: Dense pattern for thorough bore contact
• Solvent Compatibility: Universal - all cleaning chemicals
• Country of Origin: USA

The BT40NBB represents the evolution of bore cleaning technology, combining effective fouling removal with barrel preservation. Professional armorers and serious shooters recognize nylon brushes as essential tools for maintaining accuracy while extending barrel life.