What thread pattern does the Kleenbore A191N bore brush use, and will it fit my existing cleaning rod?

The Kleenbore A191N features a standard #8-32 male thread pattern. It is designed to fit seamlessly onto standard handgun cleaning rods and pull-through adapters commonly used by Australian pistol club members.

Which specific calibres are compatible with the Kleenbore A191N nylon bore brush?

This brush is specifically engineered for bore diameters between .400 and .410 inches, providing a precise fit for .40 S&W, .41 Remington Magnum, and 10mm Auto handguns. It is mechanically unsuitable for smaller .22 to 9mm calibres or larger .44 and .45 calibres.

Can I use aggressive chemical solvents with these nylon bristles without damaging the brush?

Yes, unlike bronze brushes, the heavy-duty stiff black nylon bristles will not degrade or react to aggressive ammonia- or copper-removing bore solvents. Furthermore, nylon will not produce false copper fouling indicators like the blue or green discoloration often seen with bronze.

Is this nylon brush suitable for removing heavy copper or lead fouling, or should I choose a phosphor bronze brush instead?

While the Kleenbore A191N is excellent for routine maintenance and applying chemical solvents, heavy baked-on copper fouling or severe lead buildup requires greater mechanical abrasion. For those heavier tasks, armourers recommend transitioning to a stiffer phosphor bronze brush.

10mm Nylon Bore Brush - KleenBore A191N

The Kleenbore .40/10mm Handgun Nylon Bore Brush is a calibre-specific firearm maintenance tool engineered for cleaning handgun barrels without chemical degradation. Constructed with heavy-duty, stiff black nylon bristles on a twisted wire core with a threaded brass coupler, this brush scrubs powder residue and general fouling from bore walls. Unlike traditional metal bristles, nylon does not interact with harsh ammonia-based or copper-removing bore solvents, preventing false-positive copper fouling discoloration during routine firearm care.

Key Features

Chemical-Resistant Bristles: Stiff black nylon construction resists aggressive bore solvents and eliminates false copper fouling indicators during barrel cleaning.
Calibre-Specific Sizing: Engineered specifically for bore diameters across .40 S&W, .41 Remington Magnum, and 10mm Auto handguns.
Standard Thread Coupler: Machined with an industry-standard #8-32 male thread pattern to connect directly to standard handgun cleaning rods and pull-through adapters.
Non-Metallic Bore Contact: Scours powder residue and combustion fouling without introducing metallic bristles to the rifling.

Specifications

Calibre Compatibility: .40 S&W, .41 Remington Magnum, 10mm Auto (.400 in to .410 in bore diameters)
Thread Pattern: #8-32 male thread
Bristle Material: Heavy-duty, stiff black nylon
Core / Coupler Material: Twisted wire core with brass coupler
Operation: Manual (unpowered)

Who is the Kleenbore .40/10mm Handgun Nylon Bore Brushes for?

IPSC and Service Pistol Shooters Maintaining .40 S&W Firearms — requires a dedicated handgun nylon bore brush fitted with standard #8-32 male threading to apply strong chemical solvents safely through .40 S&W barrel rifling without degrading the bristles.
Pistol Club Members Shooting 10mm Auto Handguns — relies on non-metallic bore scrubbing sized specifically for 10mm bore diameters to remove powder fouling during regular post-range firearm maintenance.

Less suitable for: Firearm bores outside the .400 to .410 in diameter range (including .22 through 9mm/.357 calibres and .44 to .45 calibres), as well as heavy, baked-on copper fouling or severe lead buildup, where a stiffer phosphor bronze bore brush suits better.

SKU	KLB40989LP
Model #	A191N
Brand	Kleenbore
Shipping Weight	1.0000kg

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Kleenbore A191n Handgun Nylon Bore Brush 10mm .40 Cal

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