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 The M4 was a French submarine-launched ballistic missile (SLBM) deployed on the nuclear s (except the ''Redoutable'' herself, which was not refitted). They entered service on May 1, 1985. They were the first French MIRV-capable nuclear missiles, ...

, 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

* , a 1980 Swedish Navy minelayer, later redesignated as ocean patrol vessel P04 * , a Swedish Navy mine sweeper * (M4), a WWI British Royal Navy monitor * , 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) Cryptanalysis of the Enigma ciphering system enabled the western Allies in World War II to read substantial amounts of Morse-coded radio communications of the Axis powers that had been enciphered using Enigma machines. This yielded military int ...

, a variant of the Enigma cryptography machine * M04, desert variant of

M05 The M05, sometimes known as the M05 Terrain Pattern ( fi, M05 Maastokuvio), is a family of military camouflage patterns used by the Finnish Defence Forces on uniforms and other equipment. The pattern is licensed by the Finnish Defence Forces< ...

, 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 __NOTOC__ NVC community M4 (''Carex rostrata'' - ''Sphagnum recurvum'' mire) is one of the mire communities in the British National Vegetation Classification system. It is a localised community of northern and western Britain. There are no subco ...

, a type of mire plant community in the British National Vegetation Classification system * M4, the FAB classification of acute myelomonocytic leukemia * Muscarinic acetylcholine receptor M₄, a protein

Computing and electronics

* m4 (computer language), a macro processing language * M4, part number for a

1N400x general purpose diode The 1N400x (or 1N4001 or 1N4000) series is a family of popular one-ampere general-purpose silicon rectifier diodes commonly used in AC adapters for common household appliances. Its blocking voltage varies from 50 volts (1N4001) to 1000 volts ...

* 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 Foton-M No.4 is a Russian microgravity and bioscience research spacecraft launched in July 2014 as part of the Foton programme. It is the fourth spacecraft in the Foton-M series, and the first to use the 34KSM configuration incorporating the equi ...

, 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) Line 4 (officially: South Buda–Rákospalota (DBR) Line, Metro 4 or M4, and unofficially: Green Line) is the fourth line of the Budapest Metro. It opened on 28 March 2014. The first section, 7.4 km in length and consisting of ten stations ...

, 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 Line 4 is an underground rapid transit line in Milan, Italy, part of the Milan Metro. The line color is blue. The first section opened on 26 November 2022 and the rest of the line expected to open by 2023. Once completed, the line will be long wi ...

, rapid transit line in Milan, Italy *

Sri Lanka Railways M4 The Sri Lanka Railways M4 is a class of diesel-electric locomotive manufactured in Canada by Montreal Locomotive Works. Fourteen of the manufacturers' model MLW MX-620, MX-620 were imported in 1975. This was the longest locomotive in the Sri Lan ...

, a class of diesel-electric locomotive

Road

BMW M4 The BMW M4 is a high-performance version of the BMW 4 Series coupes and convertibles developed by BMW's motorsport division, BMW M, and marketed since 2014. As part of the renumbering that splits the 3 Series coupé and convertible models into t ...

, a car * M4 Vacamatic, a 1941 semi-automatic transmission made by Chrysler * M4, a bus route of

Fifth and Madison Avenues Line The M1, M2, M3, and M4 are four local bus routes that operate the Fifth and Madison Avenues Lines – along one-way pair of Madison and Fifth Avenues in the Manhattan borough of New York City. Though the routes also run along other major ave ...

, New York City, U.S. * Mid-engine, four-wheel-drive layout, or M4 layout, an automotive design *

List of M4 roads This is a list of roads designated M4: * M4 (East London), a Metropolitan Route in East London, South Africa * M4 (Cape Town), a Metropolitan Route in Cape Town, South Africa * M4 (Pretoria), a Metropolitan Route in Pretoria, South Africa * M4 (D ...

Other uses

Héctor David Delgado Santiago Héctor David Delgado Santiago (23 December 1975 – 15 January 2013), commonly referred to by his alias El Metro 4, was a suspected Mexican drug lord and high-ranking leader of the Gulf Cartel, a criminal group based in Tamaulipas. Born and rais ...

(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