The KleenBore .223 Cal. / 5.56mm Military Style Chamber Brush (Model M16C) is a specialised firearm cleaning accessory designed to scrub carbon, fouling, and debris from rifle chambers and locking lug recesses. Engineered for .223 Remington and 5.56×45mm NATO chambers, it features a dual-stage cleaning configuration. The forward phosphor bronze section cleans the internal cartridge chamber walls, while the wider rear stainless steel section scrubs the bolt lockup area and star chamber. The brush utilizes a heavy-duty core wire looped directly through a solid brass coupling to prevent bristle separation under rotational force, utilizing a military-spec #8-36 thread fitting.

Key Features

• Dual-Stage Construction: Combines a phosphor bronze front brush for the chamber body with a wider stainless steel rear brush for cleaning locking lug recesses.
• Looped Core Wire Design: Heavy-duty core wire is looped through a solid brass coupling to resist bristle shedding and separation during rotation.
• Calibre-Specific Profile: Sized specifically to match the internal dimensions of .223 Rem and 5.56mm NATO rifle chambers.
• Manual Cleaning Tool: Unpowered, fully mechanical maintenance brush with a packaged weight under 30 g for bench or field kit use.

Product Specifications

• Calibre Compatibility: .223 Remington / 5.56×45mm NATO
• Thread Fitting: Military-spec #8-36 male thread
• Bristle Materials: Phosphor bronze (front stage) and stainless steel (rear stage)
• Coupling Material: Solid brass
• Packaged Weight: Under 30 g

Who is the Kleenbore 223/5.56mm Military Chamber Brush for?

• AR-15, M16, and M4 platform owners — requires a dual-stage military style chamber brush matching the locking lug dimensions of .223 Remington and 5.56×45mm NATO star chambers to scrub heavy carbon fouling from bolt lockup recesses.
• Bolt-action and chassis rifle shooters — utilizes a dedicated military-spec #8-36 thread fitting and phosphor bronze front section to remove baked-on debris from .223 Remington cartridge chambers without bore distortion.

Less suitable for: Standard commercial cleaning rods with #8-32 threads (which require an 8-36 to 8-32 thread adapter), rifle barrel bores where rigid stainless steel bristles can damage rifling, or larger calibres such as .308 Winchester / 7.62mm NATO, which require a dedicated larger military chamber brush.