title: M4
text: # M4
  
  M4 or M-4 most often refers to:
  
  * M4 carbine, an American carbine
  * M4 Sherman, an American World War II medium tank
  
  M4, M04, or M-4 may also refer to:
  
  ## Arts and entertainment
  
  * M4 (EP), a 2006 EP by Faunts
  * M4 (video game), a 1992 computer game developed for the Macintosh
  * M.IV ("Matrix IV"), the fictional Warner Brothers videogame project inside the 2021 film The Matrix Resurrections
  
  ## Military
  
  ### Weapons
  
  * Benelli M4 Super 90, an Italian semi-automatic shotgun
  * M4 cannon, an American 37 mm automatic gun
  * M4 Selectable Lightweight Attack Munition (SLAM), an American land mine
  * M4 SLBM, a French submarine-launched ballistic missile from 1985
  * M4 Survival Rifle, an American rifle in aircraft survival gear
  * Spectre M4, an Italian submachine gun
  * M4 bayonet, an American World War II bayonet used for the M1 Carbine
  * Gross-Basenach M IV, a pre-WWI German military semi-rigid airship
  
  ### Aircraft, ships and vehicles
  
  * HSwMS Carlskrona (M04), a 1980 Swedish Navy minelayer, later redesignated as ocean patrol vessel P04
  * HSwMS M4, a Swedish Navy mine sweeper
  * HMS Roberts (1915) (M4), a WWI British Royal Navy monitor
  * HMS M4 (1919), a British M-class submarine
  * M4 Tractor, a U.S. Army artillery tractor from 1943
  * Myasishchev M-4, a 1950s Soviet strategic bomber aircraft
  * Meusel M-IV, a German glider; see List of German gliders
  
  ### Other uses in military
  
  * M4 flame fuel thickening compound, a substance used in fire bombs and incendiary weapons
  * M4 (German Navy 4-rotor Enigma), a variant of the Enigma cryptography machine
  * M04, desert variant of M05, a camouflage pattern used by the Finnish Defence Forces
  
  ## Science and technology
  
  ### Biology, medicine and organic chemistry
  
  * ATC code M04, Antigout preparations, a subgroup of the Anatomical Therapeutic Chemical Classification System
  * British NVC community M4, a type of mire plant community in the British National Vegetation Classification system
  * M4, the FAB classification of acute myelomonocytic leukemia
  * Muscarinic acetylcholine receptor $M_4,$ a protein
  
  ### Computing and electronics
  
  * m4 (computer language), a macro processing language
  * M4, part number for a 1N400x general purpose diode
  * Sony Xperia M4 Aqua, a mobile phone
  * ARM Cortex-M#Cortex-M4, a processor family
  
  ### Other uses in science and technology
  
  * Messier 4 (M4), a globular cluster in the Scorpius constellation of stars
  * Leica M4, a 1967 35 mm camera
  * M4, an ISO metric screw thread
  * Foton-M No.4, a Russian microgravity and bioscience research spacecraft launched in July 2014
  
  ## Transportation
  
  ### Air
  
  * Covington Municipal Airport (Tennessee), FAA location identifier M04
  * Maule M-4, a 1960 American four-seat cabin monoplane aircraft
  * Miles M.4 Merlin, a 1930s British five-seat cabin monoplane aircraft
  
  ### Rail
  
  * Bucharest Metro Line M4, Romania
  * Line 4 (Budapest Metro), Metro 4 or M4, Hungary
  * M4 (Copenhagen), a future expansion of the Copenhagen Metro, Denmark
  * M4 (Istanbul Metro), a subway line on the Asian side of Istanbul, Turkey
  * M4, variant of M2 (railcar), an American railcar on the Metro-North Railroad
  * Milan Metro Line 4, rapid transit line in Milan, Italy
  * Sri Lanka Railways M4, a class of diesel-electric locomotive
  
  ### Road
  
  * BMW M4, a car
  * M4 Vacamatic, a 1941 semi-automatic transmission made by Chrysler
  * M4, a bus route of Fifth and Madison Avenues Line, New York City, U.S.
  * Mid-engine, four-wheel-drive layout, or M4 layout, an automotive design
  * List of M4 roads
  
  ## Other uses
  
  * Héctor David Delgado Santiago (1975–2013, alias El Metro 4, sometimes M4), deceased Mexican drug lord
  * M4, a measure of money supply
  * M4-, M4+ and M4x, disciplines in men's rowing
  * MLBB M4 World Championship, the fourth esports world championship for the mobile game Mobile Legends: Bang Bang held in 2023
  * M4, a difficulty grade in mixed climbing
  