Conditions in the field or range can be extremely tough on your Modern Sporting Rifle. Give your rifle a quick, effective cleaning in the field without disassembly, or a thorough cleaning at the bench with this lightweight system. The MSR/AR Cleaning System is designed to clean and maintain all .223 caliber/5.56MM rifles. Included in this system is the B.O.N.E. (Bolt Operational Necessary Equipment) Tool®, designed specifically to clean the bolt carrier assembly area, as well as the new Mongoose® G2, designed for quick field cleaning. The MSR/AR Cleaning System combined with the Otis TRS® Rail makes for a perfect gift for any MSR/AR enthusiast.