Otis FG317NB Bore Brush Set - 17 HMR/.177 Cal/.177 WSM, 5-40" Thread, 1" Bronze/Nylon Bristles (2-Pack)

Keeping your rimfire barrel clean is fundamental to accuracy and reliability, and the Otis FG317NB Bore Brush Set gives you the right tool for .17 HMR, .177 Cal, and .177 WSM rifles. This two-pack of bronze and nylon bristle brushes fits the standard 5-40" thread found on most rimfire cleaning rods, making them compatible with Otis systems and other mainstream rod setups. Bronze bristles are gentle enough to protect your bore from damage while remaining tough enough to scrub away powder residue and fouling—nylon backing provides extra durability without aggressive scoring.

Whether you're breaking in a new .17 HMR or running routine maintenance after a range session, these brushes are sized at 1" long to give you solid coverage and control as you push them through. The two-brush format means you've got a spare on hand, or you can rotate them to extend their working life. Otis has been the standard in field gun cleaning for decades, and these brushes carry that same no-nonsense engineering.

If you're running Otis's modular cleaning system or any compatible rimfire rod, this set fits right in. Add it to your cleaning kit and you'll have a dependable, affordable way to keep your bore in fighting shape between hunts and range trips.

Key Features

• Fits .17 HMR, .177 Cal, and .177 WSM bores
• Bronze and nylon bristles—effective cleaning without bore damage
• Standard 5-40" thread for broad compatibility
• 1" brush length for solid contact and control
• Two-pack—one working, one spare
• Designed for modular Otis cleaning systems

Specifications

Frequently Asked Questions

Will these brushes work with my Otis cleaning rod?

Yes. The FG317NB brushes have the standard 5-40" thread, which is compatible with Otis modular cleaning systems and other standard rimfire cleaning rods that use this thread size.

What calibers fit this brush set?

These brushes are sized for .17 HMR, .177 Cal, and .177 WSM cartridges.

Why bronze and nylon bristles?

Bronze is softer than steel, so it scrubs away fouling and powder residue without scratching or damaging your bore. The nylon backing adds durability and helps the brush maintain its shape through repeated use.

How many brushes are in this pack?

You get two brushes per pack—enough to have a backup or rotate them to extend service life.