The Breakthrough Clean Phosphorus Bronze Chamber Brush (brand part no. BT308PBCBAR) is sized for .308-platform AR chambers, giving shooters a dedicated tool for the area a standard bore brush can’t fully reach. Breakthrough Clean Technologies builds the brush around a twisted brass core that keeps the durable phosphor bronze bristles rigid, delivering a deeper cleaning action than nylon brushes without damaging the chamber. It uses the standard #8-32 thread pattern, which also matches the standard shotgun #5/16-27 thread on .410, 28-gauge, 20-gauge, and 12-gauge applications. Each brush ships one per package and threads directly onto a standard cleaning rod.

Key Specifications

• Sized for .308-platform AR chambers, targeting the area standard bore brushes miss.
• Built with phosphor bronze bristles around a twisted brass core for a deeper clean than nylon.
• Uses a standard #8-32 thread pattern compatible with most cleaning rods.
• Also compatible with the standard shotgun #5/16-27 thread for .410 through 12-gauge applications.
• Sold one brush per package, ready for immediate use.
• Measures 3 inches long, sized to fully seat and work the chamber.

Frequently Asked Questions

What chamber is this brush sized for? It is built specifically for .308-platform AR chambers.

Is it safe on the chamber’s finish? Yes, the phosphor bronze bristles clean thoroughly without damaging the chamber.

Buy the Breakthrough Clean Phosphorus Bronze Chamber Brush, .308 Cal AR

A dedicated chamber brush keeps carbon from building up where it matters most. Order this Breakthrough Clean brush from our Lubbock, Texas gun shop for fast, direct shipping and stock your gun cleaning supplies.