Brownells 75th Anniversary - A Shooting Heritage

AR owners know the importance of a clean bolt and bolt carrier group. Carbon and fouling can build-up in these areas, causing jams and malfunctions. The B.O.N.E.® Tool was designed specifically to clean the bolt carrier assembly area of 5.56 rifles.

 This quick-clean tool serves four purposes- Scrapes carbon and fouling from the:

  • Bolt
  • Bolt Carrier
  • Firing Pin
  • Includes a 8-32 threaded hole to act as a T-handle

Note: While this tool fits many bolts flawlessly, it may fit some bolts better than others due to variance in bolts by different manufacturers.

AR-15, Issue:11, Page:080
Big Book Catalog, Issue:73, Page:089
Big Book Catalog, Issue:73, Page:091

For .223 cal./5.56mm Modern Sporting Rifles