The Otis B.O.N.E. Tool (brand part no. FG-246) was designed specifically to clean the bolt carrier assembly area on a 5.56mm rifle, serving four purposes in one quick-clean tool: it scrapes carbon and fouling from the bolt, bolt carrier, and firing pin. An 8-32 threaded hole lets the tool act as a T-handle for added leverage during cleaning. Because bolt geometry varies between manufacturers, this steel tool may fit some bolts better than others. It’s built for AR-15 owners who want a fast, dedicated way to clear carbon buildup from the bolt carrier group without a full breakdown.

Key Specifications

• Built for 5.56mm rifle bolt carrier groups.
• Measures 5 inches in overall length.
• Constructed from steel for durable, repeated use.
• Scrapes carbon and fouling from the bolt, bolt carrier, and firing pin.
• Weighs approximately 0.1625 lb as shipped.
• Uses an 8-32 inch threaded T-handle hole for added leverage.
• Part of the Bone Tool model line.
• Ships as a single quantity of 1 tool.
• Classified as a B.O.N.E. Tool product type.

Frequently Asked Questions

What does the B.O.N.E. Tool clean? The bolt, bolt carrier, and firing pin area of a 5.56mm AR-platform rifle.

Does this tool fit every bolt? It may fit some bolts better than others due to variance in bolts between manufacturers.

Buy the Otis B.O.N.E. Tool

Clear carbon fast with Otis Technologies. Browse our full range of gun cleaning kits and supplies and order from our Lubbock, Texas gun shop for fast, insured shipping.