Otis FG325NB Bore Brush Set - 6mm/.250/.243/.257 Cal, 8-32" Thread, 2" Long, Bronze/Nylon Bristles, 2-Pack

Keep your rifle bore in top shape with the Otis FG325NB Bore Brush Set, a matched pair of bronze and nylon brushes designed for 6mm, .250, .243, and .257 caliber rifles. Whether you're breaking in a new barrel, running regular maintenance, or deep-cleaning after a range session, having the right bore brush makes all the difference—and this two-pack ensures you've always got a fresh one on hand. The 8-32" thread fits standard cleaning rods, and the 2-inch length gives you solid reach without being unwieldy in the field or at the bench.

Otis Technology built these brushes to outlast the competition. The core wire uses a proprietary Tufcor material that resists corrosion and holds bristles tight, even after dozens of cleaning cycles. The denser bristle fill means more contact with the bore wall, translating to better removal of fouling, copper, and carbon buildup. Bronze bristles excel at scrubbing tough deposits without damaging the rifling; nylon bristles are gentler for maintaining a clean bore or for use with solvents that can degrade bronze over time. Having both in one set gives you options depending on your cleaning regimen.

The caliber marking is printed right on the brush stem, so there's no guessing which one goes where—a small touch that prevents cross-threading and keeps your rifle's bore safe. If you shoot multiple cartridges in this caliber family, this set pays for itself quickly by eliminating the need to buy brushes individually.

Key Features

• Bronze and nylon bristles included—choose the right material for your cleaning stage
• Tufcor corrosion-resistant core wire for extended brush life
• Denser bristle fill for superior fouling and copper removal
• 2-inch length with 8-32" thread for standard cleaning rods
• Caliber-marked stem for quick identification
• Two brushes per set—always have a backup

Specifications

Frequently Asked Questions

Will these brushes fit my cleaning rod?

Yes, as long as your cleaning rod has an 8-32" female thread, which is the standard for most rifle cleaning rod systems. The 2-inch brush length works with both short and long bore cleaning applications.

When should I use bronze versus nylon?

Bronze bristles are more aggressive and better suited for removing stubborn fouling, copper deposits, and carbon buildup. Nylon bristles are softer and ideal for maintaining a clean bore or when using solvents that may affect bronze. Having both lets you tailor your cleaning approach to the job at hand.

What calibers does this set cover?

This set is caliber-specific for 6mm, .250, .243, and .257 cartridges. The caliber is marked on the brush stem to prevent mixing with brushes for other bore diameters.

Is this set enough for regular maintenance?

The two-brush set gives you both bronze and nylon options in one purchase. For shooters who clean rifles regularly, having matched pairs means you can run one while the other dries, or swap between materials without needing to purchase separate sets.