HOP Rifle Chamber Brush AR 5.56mm/.223 Double Diameter CA

A Hoppe's AR rifle chamber brush for 5.56mm/.223 is an essential maintenance tool for keeping your AR platform clean and functioning reliably. Chamber fouling—carbon, copper, and powder residue—builds up with every shot and can affect accuracy, extraction, and bolt lockup if left unchecked. This double-diameter brush is sized specifically for the 5.56mm/.223 chamber, making it the right choice for AR-15 owners who want to do thorough, targeted cleaning without guesswork.

Chamber brushes are often overlooked in routine cleaning routines, but they tackle a spot that standard bore brushes can't reach effectively. After firing, residue accumulates on the chamber walls and in the throat area—a place where a bore brush runs through too quickly to do real work. A dedicated chamber brush lets you scrub that critical area thoroughly, working back and forth to break up stubborn fouling. It's part of a complete cleaning regimen alongside your bore brush and patches.

The double-diameter design gives you contact where it counts: the larger diameter section seats firmly in the chamber while you work, and the transition allows you to scrub both the chamber walls and the throat area. Pair it with your preferred bore solvent, a cleaning rod, and a few passes to keep your AR running clean. If you shoot regularly—whether on the range, in competition, or hunting—chamber maintenance is worth the few minutes it takes.

Key Features

• Sized for 5.56mm/.223 AR-15 chambers
• Double-diameter construction for efficient chamber and throat cleaning
• Works with standard bore-cleaning rods and solvents

Frequently Asked Questions

Will this brush fit my AR-15?

Yes, this brush is sized for 5.56mm/.223 chambers in AR-15 rifles. If you shoot an AR-10 or larger-caliber AR platform, you'll need a brush matched to that chamber diameter.

What do I need to use this brush?

You'll need a cleaning rod, bore solvent, and access to your rifle's chamber. Thread the brush onto your rod, apply solvent, and work the brush back and forth in the chamber to loosen and remove fouling.

How often should I clean my chamber?

Chamber maintenance depends on your shooting volume and how critical accuracy is to you. High-volume shooters and those chasing tight groups typically clean chambers regularly; casual shooters may do it less often. Regular cleaning helps maintain reliability and performance.