{{Wiktionary|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:
{{TOC right}}
== 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'' * M4, the robot assistant to the character Flint in the Star Trek episode Requiem for Methuselah
== Military ==
=== Weapons ===
* Benelli M4 Super 90, an Italian semi-automatic, gas-operated shotgun * M4 autocannon, 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 ===
* {{ship|HSwMS|Carlskrona|M04}}, a 1980 Swedish Navy minelayer, later redesignated as ocean patrol vessel ''P04'' * {{ship|HSwMS|M4}}, a Swedish Navy mine sweeper * {{ship|HMS|Roberts|1915}} (M4), a First World War British Royal Navy monitor * {{ship|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<sub>4</sub>, a protein
=== Computing and electronics ===
* Apple M4, a central processing unit in the Apple M series * m4 (computer language), a macro processing language * M4, part number for a 1N400x general purpose diode * Sony Xperia M4 Aqua, a mobile phone * {{Section link|ARM Cortex-M#Cortex-M4}}, a processor family * M4 Data, a defunct British tape library manufacturer
=== 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 the M2, an American electric multiple unit on the Metro-North Railroad * M4, an American rapid transit car on the Market–Frankford Line * Milan Metro Line 4, rapid transit line in Milan, Italy * Sri Lanka Railways M4, a class of diesel-electric locomotive * M4 (Warsaw), proposed subway line in Warsaw, Poland
=== Road ===
* List of M4 roads with the same name in many countries * 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
== Other uses ==
* Héctor David Delgado Santiago (1975–2013, alias El Metro 4, sometimes M4), Mexican drug lord * M4, a measure of money supply * M4-, M4+ and M4x, disciplines in men's rowing * MLBB M4 World Championship, the fourth ''Mobile Legends: Bang Bang'' World Championship held in 2023 at the conclusion of the 2022 season * M4, a difficulty grade in mixed climbing
== See also == {{canned search|m4|m-4}} * {{in title}} * {{look from}} * MIV (disambiguation) * 4M (disambiguation)
{{Letter-NumberCombDisambig}}