The J Dewey Rods 37mm/40mm 5/16-27 male Grenade launcher mop is a specialized cleaning tool designed for the maintenance and care of grenade launcher barrels. Engineered with precision, this mop features a 5/16-27 male thread, ensuring compatibility with a wide range of cleaning rods and accessories. The mop is specifically tailored for use with 37mm and 40mm grenade launcher barrels, providing efficient and thorough cleaning to maintain optimal performance and longevity of the firearm. Constructed from high-quality materials, the J Dewey Rods mop is designed to withstand repeated use while effectively removing residue and debris from the barrel interior. Its robust design ensures durability and reliability, making it an essential tool for military, law enforcement and firearm enthusiasts who require meticulous maintenance of their equipment. The mop's design facilitates easy attachment and removal, allowing for quick and efficient cleaning sessions. Its compatibility with standard cleaning rods enhances its versatility, making it a valuable addition to any firearm maintenance kit. Grenade Launcher/Riot gun cleaning tool Male threads with a 5/16-27 unified national special (UNS) specification 100% cotton grenade launcher cleaning mop