Breakthrough Clean BT40NBB .40 Cal Nylon Bristle Bore Brush

Keeping a .40 caliber barrel clean is essential for reliable performance and long barrel life, and a quality nylon bristle bore brush is one of the most effective tools for the job. The Breakthrough Clean BT40NBB .40 Cal Nylon Bristle Bore Brush is a purpose-built cleaning implement sized and designed specifically for .40 S&W handguns and rifles. Whether you're running a Glock, M&P, or any other .40 platform, this brush pairs well with your favorite bore solvent or cleaner and a standard cleaning rod to scrub away fouling, copper, and powder residue from the barrel.

Nylon bristles are gentler on barrel steel than stainless or brass alternatives, making them ideal for routine maintenance without the risk of accelerated wear. They're effective enough to break up stubborn buildup yet forgiving enough for regular use between deeper copper-removal sessions. Breakthrough Clean Technologies has built a solid reputation for no-nonsense cleaning tools that work, and this bore brush is no exception—straightforward, affordable, and built to last.

If you shoot .40 regularly at the range or in the field, keeping a bore brush like this one on hand means you're never without a quick way to maintain your barrel. Pair it with your cleaning kit and solvent, and you've got everything you need for a thorough field or bench cleaning.

Key Features

• Caliber-specific design for .40 S&W handguns and rifles
• Nylon bristles for gentle yet effective barrel cleaning
• Compatible with standard .40 bore cleaning rods
• Built for routine maintenance and solvent-based cleaning

Frequently Asked Questions

Will this bore brush work with my .40 S&W handgun?

Yes. The BT40NBB is sized and designed for .40 caliber barrels, including .40 S&W handguns and .40-chambered rifles. Use it with your standard cleaning rod and bore solvent.

Are nylon bristles safe for my barrel?

Nylon bristles are gentler on barrel steel than stainless or brass alternatives, making them well-suited for regular maintenance cleaning without risk of excessive wear.

What should I use with this brush?

Pair this bore brush with a standard cleaning rod and your preferred bore solvent or gun cleaner. Push the brush through the barrel several times to break up fouling and residue, then follow up with a patch.