Gallery: Otis bone AR MSR

The Otis B.O.N.E. is a very specialized tool meant to take care of the three most carbon fouled areas of the AR/MSR rifle's bolt and bolt carrier in .223/5.56 caliber

Otis B.O.N.E. tool
Franco Palamaro
The Otis B.O.N.E. tool
Otis B.O.N.E. tool
Franco Palamaro
The Otis B.O.N.E. is a three-in-one Bolt, Carrier, and Firing Pin cleaning tool/scraper
Otis B.O.N.E. tool
Franco Palamaro
Cleaning the bolt carrier recess is a breeze: just insert the B.O.N.E. and twist
Otis B.O.N.E. tool
Franco Palamaro
The part of the firing pin the tool cleans is the flange that limits the pin's travel in the bolt and that gets a lot of carbon buildup
Otis B.O.N.E. tool
Franco Palamaro
Although it gets the job done, it takes a lot of pressure to remove heavy carbon buildup from the bolt tail