The Otis 5.56mm Chamber Brush (brand part no. FG-367-HT) is built for anyone who shoots an M4, M16, or AR15, targeting the parts of the chamber that a standard bore brush cannot reach effectively. Otis Technologies fits the brush with aggressive bronze bristles to scrub the chamber, neck, and shoulder, and adds steel bristles at the base specifically to clean the star chamber of the locking lugs. A standard 8-32 thread lets the brush attach to the rest of an Otis cleaning system, making it an easy add-on to an existing 5.56mm cleaning routine.

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Key Specifications

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• Sized for .223 Rem/5.56 NATO chambers.

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• Threaded 8-32, compatible with standard Otis cleaning cables and rods.

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• Measures 1 in. in brush length.

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• Fitted with aggressive bronze bristles for the chamber, neck, and shoulder.

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• Adds steel bristles at the base to scrub the star chamber of the locking lugs.

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Frequently Asked Questions

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What firearms is this brush built for? M4, M16, and AR15 platforms chambered in 5.56mm.

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What does the brush clean that a bore brush misses? The chamber, neck, shoulder, and the star chamber of the locking lugs.

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Buy the Otis 5.56mm Chamber Brush

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Get the chamber and locking lugs as clean as the bore. Order the Otis 5.56mm Chamber Brush from our Lubbock, Texas gun shop for fast, insured shipping. Otis Technologies builds this brush specifically for AR-platform chambers, and it is an essential add-on from our gun cleaning kits and supplies lineup.