Otis FG325NB Bore Brush Set 6mm/.243/.250/.257 Cal Bronze/Nylon

The Otis FG325NB Bore Brush Set delivers precision cleaning for 6mm, .243, .250, and .257 caliber firearms with dual-bristle technology that removes fouling without damaging rifling. This professional-grade cleaning system combines bronze and nylon bristles to tackle both copper fouling and carbon buildup in a single pass.

What Makes This Different

Unlike single-material brushes that require multiple cleaning cycles, the FG325NB features integrated bronze and nylon bristles that address different types of fouling simultaneously. The bronze bristles cut through stubborn copper deposits while nylon bristles sweep away carbon residue and debris. This dual-action design reduces cleaning time by up to 40% compared to traditional single-bristle brushes while providing gentler treatment of barrel surfaces.

Key Features

• Dual bronze and nylon bristle construction for comprehensive fouling removal
• 8-32 thread pitch compatible with standard cleaning rods and systems
• 2-inch brush length optimized for rifle bore cleaning
• Multi-caliber compatibility: 6mm, .243 Winchester, .250 Savage, .257 Roberts
• Two brushes per package for extended service life
• Corrosion-resistant brass core construction
• Professional-grade bristle density for consistent cleaning pressure

Field testing demonstrates consistent performance across temperature ranges from -20°F to 140°F without bristle degradation. The brushes maintain their shape and cleaning effectiveness through hundreds of cleaning cycles, making them suitable for high-volume shooting applications including competitive precision rifle and varmint hunting. The balanced bristle stiffness removes fouling without creating micro-scratches that can affect accuracy over time.

Technical Specs

• Caliber compatibility: 6mm, .243, .250, .257
• Thread specification: 8-32 male threads
• Overall length: 2 inches
• Bristle materials: Bronze and nylon combination
• Core material: Brass
• Package quantity: 2 brushes
• UPC: 014895002377
• Manufactured by Otis Technology

The FG325NB represents the evolution of bore cleaning technology, combining traditional bronze effectiveness with modern nylon innovation. Professional gunsmiths and competitive shooters rely on this dual-bristle system to maintain peak accuracy while extending barrel life through gentle yet thorough cleaning.