Otis FG341NB 10mm/40 Cal Bronze/Nylon Bore Brush Set 8-32 Thread

The Otis FG341NB Bore Brush Set delivers professional-grade cleaning performance for 10mm and .40 caliber firearms. This dual-bristle system combines bronze and nylon materials to remove stubborn fouling while protecting barrel integrity during routine maintenance.

What Makes This Different

Unlike standard single-material brushes, the FG341NB features both bronze and nylon bristles in a dual-brush configuration. The bronze bristles cut through copper fouling and carbon buildup, while nylon bristles provide gentle final cleaning without scratching. This two-stage approach reduces cleaning time by 40% compared to using separate brushes sequentially.

Key Features

• Dual bronze and nylon bristle construction for comprehensive fouling removal
• Standard 8-32 thread pitch fits most cleaning rods and systems
• 2-inch overall length optimized for 10mm and .40 caliber bore dimensions
• Two brushes per package for extended service life
• Phosphor bronze bristles resist corrosion and maintain stiffness
• High-density nylon bristles won't scratch rifling or barrel crowns
• Compatible with Otis cleaning systems and standard cleaning rods

Field testing demonstrates effective carbon removal after 200+ rounds without excessive barrel wear. The bronze bristles handle heavy fouling from lead bullets and jacketed rounds equally well. Competition shooters report consistent accuracy maintenance when using this brush system between matches. The nylon component proves particularly effective for final bore polishing before storage.

Technical Specs

• Caliber compatibility: 10mm Auto, .40 S&W
• Thread specification: 8-32 standard pitch
• Overall length: 2 inches
• Bristle materials: Phosphor bronze and high-density nylon
• Package quantity: 2 brushes
• Core material: Brass wire wound
• Country of origin: United States

The FG341NB represents proven cleaning technology backed by Otis's reputation for precision maintenance tools. Professional armorers and competitive shooters rely on this dual-bristle design for consistent bore conditioning.