The M249 Military Maintenance Tool from Otis Defense is designed for removing carbon build up from the M249 Squad Automatic Weapon.
Made in the USA, it includes specialized scrapers that clean the interior and exterior of the Gas Block and Piston Cup, a pin punch and front site adjustment tool.
There is a version for the M240 as well.
This and other products shown at Rampart Range Day are available for unit and agency orders in Canada and the US through Rampart.