What thread size does the Pro-Shot 20C chamber brush use, and will it fit my standard cleaning rod?

The Pro-Shot 20 Ga Replacement Chamber Brush features standard American Shotgun #5/16"-27 threads. If you are using a standard shotgun cleaning rod with matching threading, it screws on directly without adapters, though standard rifle or pistol rods using #8-32 threads will require a thread converter.

Can I use this 20-gauge brush to clean the full length of my shotgun barrel?

No, this accessory is designed strictly for targeted 20-gauge chamber maintenance to scrub carbon, powder residue, and plastic wad buildup right ahead of the forcing cone. For full-length barrel cleaning, you will need a standard 20-gauge bore brush mounted on a full-length cleaning rod.

Will this chamber brush work on a 12-gauge or a .410 bore shotgun?

No, the Pro-Shot 20C is built exclusively for 20-gauge shotgun chambers. It is physically too large for sub-gauges like 28 gauge or .410 bore, and too small to effectively clean 12-gauge or 10-gauge chambers, which require gauge-specific variants like the 12C model.

What materials are used in the construction of the Pro-Shot 20C brush, and how does it hold up during heavy cleaning sessions?

The brush is constructed with heavy-duty bronze bristles and a durable brass core featuring a looped end, weighing approximately 0.05 lbs. This robust non-powered mechanical build ensures it efficiently removes stubborn plastic wad buildup and carbon fouling without damaging the internal surfaces of your 20-gauge chamber.

20 Ga Chamber Brush - Pro-Shot 20C

The Pro-Shot 20 Ga Replacement Chamber Brush is a firearm maintenance tool designed specifically to scrub powder residue, carbon, lead, and melted plastic wad fouling from 20-gauge shotgun chambers. Built to prevent extraction faults, jams, and misfires caused by chamber buildup, this mechanical cleaning brush mounts to compatible tools via standard American shotgun threads. Made in the USA, it features durable bronze bristles wrapped around a brass core with a looped end to safely clean internal chamber walls without scratching or damaging the barrel steel.

Key Features

Targeted 20-Gauge Fit: Engineered to match the exact dimensions of a 20-gauge chamber to ensure complete circumferential contact and scrubbing without binding.
Durable Construction: Features heavy-duty bronze bristles paired with a brass core and looped end for corrosion resistance and bore safety.
Standard Thread Mounting: Outfitted with standard American shotgun #5/16"-27 threads to mount directly to matching chamber tool handles or cleaning rods.
Fouling Removal: Removes stubborn carbon, lead, and plastic residue to ensure smooth feeding and positive shell extraction.

Specifications

Product: Pro-Shot 20 Ga Replacement Chamber Brush
Manufacturer Part Number (MPN): 20C
Calibre/Gauge Compatibility: 20 Gauge shotgun chambers
Thread Interface: Standard American Shotgun #5/16"-27 threads
Core Material: Brass core with looped end
Bristle Material: Heavy-duty bronze
Weight: Approximately 0.05 lbs (22.7 g)
Package Dimensions: Approximately 26.7 mm × 26.7 mm × 155 mm (1.05 in × 1.05 in × 6.1 in)
Country of Origin: USA

Who is the Proshot 20 Ga Replacement Chamber Brush for?

20-Gauge Clay Target Shooters — Needs standard American shotgun #5/16"-27 threads to connect directly to chamber tool handles, allowing fast removal of heavy plastic wad fouling from 20-gauge shotgun chambers between high-volume shooting rounds.
Hunters — Benefits from a compact 0.05 lbs (22.7 g) replacement brush to clear carbon buildup and prevent extraction failures in 20-gauge shotguns between field deployments.
Firearm Armourers — Requires heavy-duty bronze bristles sized specifically for 20-gauge chambers to perform routine maintenance and maintain reliable cycling across break-action, pump-action, and semi-automatic platforms.

Less suitable for: Cleaning larger 12-gauge and 10-gauge chambers, sub-gauges like 28-gauge or .410 bore, full-length bore cleaning (which requires a dedicated full-length 20-gauge bore brush), or mounting directly to #8-32 threaded rifle/pistol cleaning rods without a thread adapter.

SKU	PS41250LP
Model #	20C
Brand	Pro-Shot
Shipping Weight	1.0000kg

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Pro-Shot 20c 20 Gauge Chamber Brush Bronze Bristles

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