Otis Technology 5.56Mm Msr/Ar B.O.N.E. Tool Black Fg-246

Otis Technology 5.56mm MSR/AR B.O.N.E. Tool Black FG-246. 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.