Otis Technology MSR/AR B.O.N.E. Tool Black 7.62mm. O.N.E. Rifle Cleaning Tool 246 has been designed specifically to clean the bolt carrier assembly area of .223 cal./5.56MM rifles. Carbon and fouling can build-up in the bolt and bolt carrier causing jams and malfunctions and this Rifle Cleaning Tool from Otis Technology will make sure that that doesn't happen. Note: While the Otis BONE Rifle Tool fits many bolts flawlessly it may fit some bolts better than others due to variance in bolts by different manufacturers. Specifications for Otis Technology MSR/AR B.O.N.E. Tool: Manufacturer: Otis Technology Color: Black Quantity: 1 Length: 5 in Threads per Inch: 8-32 Gun Type: Rifle Condition: New Features of Otis Technology 5.56mm MSR/AR B.O.N.E. Tool Designed specifically to clean carbon and fouling from the bolt carrier assembly area of MSR/AR style rifles Scrapes carbon and fouling from the bolt bolt carrier and firing pin Includes a 8-32 threaded hole to act as a T-handle Package Contents: Otis Technology 5.56mm MSR/AR B.O.N.E. Tool Otis Technology FG-276: MSR/AR B.O.N.E. Tool Black 7.62mm