Otis FG246 B.O.N.E. Tool 5.56 NATO/.223 Rem Bolt Carrier Cleaning

The Otis FG246 B.O.N.E. Tool is a purpose-built 5-inch steel scraper designed for fast field maintenance of the .223 Rem / 5.56 NATO bolt carrier group assembly. Engineered to keep the bolt area clean without a full strip, this compact tool scrapes carbon and fouling from the bolt, bolt carrier, and firing pin in seconds.

An integrated 8-32 threaded hole allows the B.O.N.E. Tool to mate with standard Otis cleaning components, so it drops straight into a routine cleaning kit without extra hardware. Hardened steel construction is sized to reach the fouling-prone pockets inside the carrier, making it the go-to quick-clean implement for any 5.56 NATO rifle sharing this bolt geometry.

Designed for rifles, the FG246 keeps the bolt carrier assembly area clear of baked-on residue, helping maintain reliable cycling and ignition. Whether run between stages at a match or as part of routine post-range cleanup, the B.O.N.E. Tool delivers focused cleaning where it matters most.