M4 or M-4 most often refers to: *

M4 carbine The M4 carbine (officially Carbine, Caliber 5.56 mm, M4) is a 5.56×45mm NATO assault rifle developed in the United States during the 1980s. It is a shortened version of the M16A2 assault rifle. The M4 is extensively used by the US mi ...

, an American carbine *

M4 Sherman The M4 Sherman, officially medium tank, M4, was the medium tank most widely used by the United States and Western Allies in World War II. The M4 Sherman proved to be reliable, relatively cheap to produce, and available in great numbers. I ...

, 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 ''The Matrix Resurrections'' is a 2021 American science fiction action film co-produced, co-written, and directed by Lana Wachowski, and the first in the ''Matrix'' franchise to be directed solely by Lana. It is the sequel to '' The Matrix Re ...

'' * Former name of band First to Eleven * M4, the robot assistant to the character Flint in the Star Trek episode

Requiem for Methuselah "Requiem for Methuselah" is the nineteenth episode of the third season of the American science fiction television series ''Star Trek''. Written by Jerome Bixby and directed by Murray Golden, it was first broadcast on February 14, 1969. In the ...

Military

Weapons

Benelli M4 The Benelli M4 is a semi-automatic shotgun produced by Italian firearm manufacturer Benelli Armi SpA, and the fourth and last model of the Benelli Super 90 line of semi-automatic shotguns. The M4 uses a proprietary action design called the "auto- ...

Super 90, an Italian semi-automatic,gas-operated shotgun *

M4 autocannon The 37 mm Automatic Gun, M4, known as the T9 during development, was a 37 mm (1.46 in) recoil-operated autocannon designed by John Browning, Browning Arms Company and entered service in 1942. The M4 and its variants would primaril ...

, an American 37 mm automatic gun * M4

Selectable Lightweight Attack Munition Selectable Lightweight Attack Munition or (M2/M3/M4 SLAM) is a small United States multi-purpose landmine produced by ATK Precision Fuze Company in Janesville, Wisconsin from 1992 to 2002. It has a passive infrared sensor, and a magnetic influen ...

(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 1 May 1985. They were the first French MIRV-capable nuclear missiles, ...

, a French submarine-launched ballistic missile from 1985 *

M4 Survival Rifle The M4 Survival Rifle was a .22 caliber bolt-action rifle developed after World War II as part of the survival gear stored under the seat of American military aircraft. It was designed to give downed aircrew a survival weapon for foraging wild gam ...

, an American rifle in aircraft survival gear *

Spectre M4 The Spectre M4 is an Italian submachine gun that was produced by the SITES factory in Turin. It was designed by Roberto Teppa and Claudio Gritti in the mid-1980s. Production in Italy ceased in the year 1997, with the closure of SITES, but proce ...

, an Italian submachine gun *

M4 bayonet 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 19 ...

, 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 First World War British Royal Navy monitor * , a British M-class submarine * M4 tractor, a U.S. Army artillery tractor from 1943 *

Myasishchev M-4 The Myasishchev M-4 ''Molot'' (), USAF/DoD reporting name "Type 37", Air Standardization Coordinating Committee, ASCC reporting name Bison) was a four-engined strategic bomber designed by Myasishchev, Vladimir Mikhailovich Myasishchev and manufa ...

, a 1950s Soviet strategic bomber aircraft * Meusel ''M-IV'', a German glider; see

List of German gliders This is a list of gliders/sailplanes of the world, (this reference lists all gliders with references, where available) Note: Any aircraft can glide for a short time, but gliders are designed to glide for longer. German miscellaneous constr ...

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 M04A Antigout preparations M04AA Preparations inhibiting uric acid production :M04AA01 Allopurinol :M04AA02 Tisopurine :M04AA03 Febuxostat :M04AA51 Allopurinol, combinations M04AB Preparations increasing uric acid excretion :M04AB01 Probeneci ...

, ''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 Acute myelomonocytic leukemia (AMML) is a form of acute myeloid leukemia that involves a proliferation of CFU-GM myeloblasts and monoblasts. AMML occurs with a rapid increase amount in white blood cell count and is defined by more than 20% of mye ...

* Muscarinic acetylcholine receptor M₄, a protein

Computing and electronics

Apple M4 Apple M4 is a series of ARM-based system on a chip (SoC) designed by Apple Inc., part of the Apple silicon series, including a central processing unit (CPU), a graphics processing unit (GPU), a neural processing unit (NPU), and a digital signal pr ...

, a central processing unit in the Apple M series *

m4 (computer language) m4 is a general-purpose macro processor included in most Unix-like operating systems, and is a component of the POSIX standard. The language was designed by Brian Kernighan and Dennis Ritchie for the original versions of UNIX. It is an extensio ...

, 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 volt ...

Sony Xperia M4 Aqua The Sony Xperia M4 Aqua is a mid-range Android smartphone developed and manufactured by Sony. The phone was unveiled along with Xperia Z4 Tablet in the press conference held by Sony during the 2015 Mobile World Congress in Barcelona, Spain, on M ...

, a mobile phone * ARM Cortex-M#Cortex-M4, a processor family

Other uses in science and technology

Messier 4 Messier 4 or M4 (also known as NGC 6121 or the Spider Globular Cluster) is a globular cluster in the constellation of Scorpius. It was discovered by Philippe Loys de Chéseaux in 1745 and catalogued by Charles Messier in 1764. It was the first g ...

(M4), a globular cluster in the Scorpius constellation of stars *

Leica M4 The Leica M4 is a 35 mm rangefinder camera produced by Ernst Leitz GmbH. Leica M4 The M4 started production in November 1966, as the direct successor of the M3 and M2, featuring framelines for 35 mm, 50 mm, 90 mm and 135 ...

, a 1967 35 mm camera * M4, an

ISO metric screw thread The ISO metric screw thread is the most commonly used type of general-purpose screw thread worldwide. They were one of the first international standards agreed when the International Organization for Standardization (ISO) was set up in 1947. T ...

* 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 The Maule M-4 is an American four-seat cabin monoplane designed by Belford Maule and built by the Maule Aircraft Company. Design and development The design of the M-4 was started in 1956 by Belford Maule and the prototype ''Bee Dee'' first ...

, 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 M4 is one of the five lines of the Bucharest Metro. It is currently long and runs from Bucharest North railway station, Gara de Nord to Străulești metro station, Străulești, following the Griviței and Bucureștii Noi avenues. History Cons ...

, 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, in length and consisting of ten stations, connects t ...

, Metro 4 or M4, Hungary *

M4 (Copenhagen) The M4 (the Harbour Line) of the Copenhagen Metro connects Nordhavn in the north with Sydhavn in the south. The central part of the line shares tracks with the City Circle Line (M3). The Nordhavn branch was approved by the Danish Parliament i ...

, a future expansion of the Copenhagen Metro, Denmark *

M4 (Istanbul Metro) The M4, officially referred to as the M4 Kadıköy - Sabiha Gökçen Airport metro line (), is a , 23-station rapid transit line of the Istanbul Metro. It is colored deep pink on the maps and route signs. Running between Kadıköy and Sabiha Gö ...

, 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 The L, formerly known as the Market–Frankford Line, is a rapid transit line in the SEPTA Metro network in Philadelphia, Pennsylvania, United States. The L runs from the 69th Street Transit Center in Upper Darby, just outside of West Philad ...

Milan Metro Line 4 Line 4 is an underground rapid transit line in Milan, Italy, part of the Milan Metro. The line is long with 21 stations. The line was opened in stages between 2022 and 2024. It features automatic driverless trains and is designed for a capac ...

, rapid transit line in Milan, Italy * Sri Lanka Railways M4, a class of diesel-electric locomotive *

M4 (Warsaw) The M4 line is the planned fourth line of the Warsaw Metro. It will have a length of approximately and will consist of 23 stations, linking Wilanów with Tarchomin. It will also include a new metro depot, STP Polfa. The line will be an importa ...

, proposed subway line in Warsaw, Poland

Road

BMW M4 The BMW M4 is a high-performance version of the BMW 4 Series automobile developed by BMW's motorsport division, BMW M, that has been built since 2014. As part of the renumbering that splits the coupé and convertible variants of the 3 Series i ...

, a car * M4

Vacamatic The 1941 M4 Vacamatic transmission by Chrysler was, historically, the first semi-automatic transmission which was marketed by a major manufacturer. It was an attempt to compete against rivals' hydraulic automatic transmissions, though it still ha ...

, 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 In automotive design, an M4, or Mid-engine, Four-wheel-drive layout places the internal combustion engine in the middle of the vehicle, between both axles and drives all four road wheels. It is a type of car powertrain layout. Although the t ...

, or M4 layout, an automotive design * List of M4 roads

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 raise ...

(1975–2013, alias El Metro 4, sometimes M4), Mexican drug lord * M4, a measure of

money supply In macroeconomics, money supply (or money stock) refers to the total volume of money held by the public at a particular point in time. There are several ways to define "money", but standard measures usually include currency in circulation (i ...

* M4-, M4+ and M4x, disciplines in men's

rowing Rowing is the act of propelling a human-powered watercraft using the sweeping motions of oars to displace water and generate reactional propulsion. Rowing is functionally similar to paddling, but rowing requires oars to be mechanically a ...

* 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 Mixed climbing is an ice climbing discipline used on climbing routes that do not have enough ice to be regular ice climbs, but are also not dry enough to be regular rock climbing, rock climbs. To ascend the route, the mixed-climber uses ice-cli ...