Otis B.O.N.E. Tool 5.56mm AR-15 Bolt Cleaner
Specialized cleaning tool designed to scrape carbon and fouling from AR-15 bolt carrier assemblies. Features 8-32 threaded hole for T-handle attachment. Works with .223/5.56mm, .300 Blackout, and .350 Legend.
Fits: AR-15
Otis B.O.N.E. Tool: Precision Bolt Carrier Cleaning
The B.O.N.E. Tool represents a focused solution to a specific problem: carbon and fouling buildup in the bolt carrier assembly of modern sporting rifles. This is not a general-purpose cleaner, but rather a specialized instrument designed with the understanding that proper maintenance extends firearm life and reliability.
Design and Function
The tool's geometry allows you to scrape fouling from three critical areas:
- Bolt face and lugs — where carbon accumulates most heavily
- Bolt carrier interior — the channel where the bolt travels
- Firing pin channel — often overlooked but essential for consistent ignition
The 8-32 threaded hole accepts any standard cleaning rod handle, giving you leverage and control during the cleaning process.
Compatibility
This 5.56mm version is engineered for rifles chambered in:
- .223 Remington
- 5.56 NATO
- .300 Blackout
- .350 Legend
Note: Due to manufacturing tolerances among bolt manufacturers, fit may vary slightly. The tool works flawlessly with most modern bolts but may require minor adjustment with some variants.
Why It Matters
A clean bolt carrier assembly ensures reliable feeding, consistent ignition, and easier operation. This tool makes that maintenance straightforward and effective.
Features
- cleans fouling and carbon from the bolt carrier assembly of ar-style firearms
- includes a 8-32 threaded hole to act as a t-handle
- scrapes carbon and fouling from the bolt, bolt carrier and firing pin
- 8-32 threaded hole to act as a t-handle
