Otis 5.56 BONE Tool
The Otis 5.56 B.O.N.E. Tool (FG-246) is a purpose-built scraper designed to strip carbon and fouling from the bolt carrier group of MSR/AR-15 rifles chambered in 5.56mm and .223. Its machined steel profile contacts the bolt, bolt carrier, and firing pin areas where carbon builds up fastest, restoring smooth function and reliable cycling. An 8-32 threaded hole accepts an Otis cleaning rod so the tool can run as a T-handle for extra leverage on stubborn deposits. Compact, pocket-sized, and made in the USA, it belongs in every AR shooter's cleaning kit.
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- SKU
- FG-246
$34.12
Description
Features
- Purpose-Built For The BCG — Engineered specifically to clean carbon and fouling from the bolt carrier assembly area of MSR/AR-style 5.56mm and .223 rifles.
- Multi-Surface Scraper — Machined contours scrape baked-on carbon from the bolt, bolt carrier, and firing pin without damaging critical surfaces.
- 5.56mm/.223 Specific Geometry — Tool profile matches the dimensions of the AR-15/M4 bolt carrier group for direct contact on the high-fouling areas.
- 8-32 Threaded Hole — Accepts a standard Otis cleaning rod or section to function as a T-handle for added leverage on stubborn carbon.
- Durable Steel Construction — Hardened steel body stands up to repeated scraping and rough field use without deforming.
- Compact Carry Profile — Roughly 5 inches in length and pocket-sized so it fits in a range bag, cleaning kit, or shooter's pouch.
- Black Finish — Low-glare black coating resists corrosion and stands up to repeated solvent exposure.
- Made In The USA — Manufactured by Otis Technology in New York to the same standards used for their military-issue cleaning systems.
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Customer Reviews
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Top customer reviews
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Makes AR cleaning so easyThe BONE tool is a game changer for cleaning my AR-15. It scrapes carbon off the bolt and carrier in seconds. Shipping was super fast too, got it in just two days!
Quickly removes buildup
Requires a separate T-handle
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A durable, threaded cleaning instrument that targets the bolt, bolt carrier, and firing pin of 5.56 mm and related rifles.I love how fast this tool gets the job done just a few passes and the bolt carrier is clean. It’s sturdy, fits the 8‑32 thread perfectly, and saves me time during range maintenance.
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