M39

M39, M-39, or M.39 may refer to:

• M39 cannon, an American aircraft-mounted automatic cannon
• M39 rifle, a Finnish variant of the Mosin-Nagant rifle
• M39 Enhanced Marksman Rifle, a semi-automatic, gas-operated rifle
• M39 lens mount, a standard lens mount for cameras
• M39 missile, a missile carried and launched from an M270 Multiple Launch Rocket System; see M270 Multiple Launch Rocket System#MLRS rockets and missiles
• M-39 (Michigan highway), a state highway in Michigan
• M39 highway (Kyrgyzstan), a highway connecting Kyrgyzstan to Kazakhstan
• M39 Pantserwagen, a tank of the Royal Dutch Army used in World War II
• M39 Armored Utility Vehicle, a variant of the American M18 Hellcat tank destroyer
• Macchi M.39, an Italian racing seaplane of 1926
• Miles M.39, a 1943 British tandem wing aircraft
• Messier 39 (M39), an open star cluster in the constellation Cygnus
• Goulburn Valley Freeway, a freeway in Victoria, Australia