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, gas-operated, magazine-fed carbine developed in the United States during the 1980s. It is a shortened version of the M16A2 assault rifle. The M4 is extensively ...

, an American carbine *

M4 Sherman } The M4 Sherman, officially Medium Tank, M4, was the most widely used medium tank by the Military history of the United States during World War II, United States and Allies of World War II, Western Allies in World War II. The M4 Sherman prove ...

, 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 produced, co-written, and directed by Lana Wachowski, and being the first in ''Matrix'' franchise to be directed solely by Lana, without her sister, Lilly. It is the s ...

Military

Weapons

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

Super 90, an Italian semi-automatic shotgun *

M4 cannon The 37 mm Automatic Gun, M4, known as the T9 during development, was a 37 mm (1.46 in) recoil-operated autocannon designed by Browning Arms Company. The weapon, which was built by Colt, entered service in 1942. It was primarily mo ...

, 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 influenc ...

(SLAM), an American land mine * M4 SLBM, a French submarine-launched ballistic missile from 1985 *

M4 Survival Rifle The M4 Survival Rifle was a .22 calibre 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 game ...

, 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 The M4 bayonet was introduced in 1944 for use with the M1 carbine. It was built on the M3 fighting knife. Description The M4 bayonet, like the M3 fighting knife that preceded it, was designed for rapid production using a minimum of strategic met ...

, 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 The M4 High-Speed Tractor for World War II was an artillery tractor used by the US Army from 1943. Design and development The M4 High Speed Tractor used M4 Sherman tracks, roadwheels and drive sprocket. One variant was designed to tow the 90 mm ...

, a U.S. Army artillery tractor from 1943 *

Myasishchev M-4 The Myasishchev M-4 ''Molot'' (russian: Молот (Hammer), USAF/DoD reporting name "Type 37", ASCC reporting name Bison) was a four-engined strategic bomber designed by Vladimir Mikhailovich Myasishchev and manufactured by the Soviet Union in ...

, 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 M4 flame fuel thickening compound is a nonhygroscopic thickener, adi-acid aluminum soap of isooctanoic acids derived from isooctyl alcohol or isooctyl aldehyd, which are obtained from the oxidization of petroleum.Department of the ArmyMilitary Expl ...

, 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 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 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 Probenecid ...

, ''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 myel ...

* Muscarinic acetylcholine receptor M₄, a protein

Computing and electronics

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 extension ...

, 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 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 designated NGC 6121) 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 globular cluster in which indiv ...

(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. Th ...

* Foton-M No.4, a Russian microgravity and bioscience research spacecraft launched in July 2014

Transportation

Air

Covington Municipal Airport (Tennessee) Covington Municipal Airport is a city-owned public-use airport located three miles (5 km) northeast of the central business district of Covington, a city in Tipton County, Tennessee, United States. Facilities and aircraft Covington Municipal ...

, 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 The Miles M.4A Merlin was a 1930s British five-seat cabin monoplane built by Miles Aircraft Limited. Design and development The Merlin was designed by F.G. Miles of Philips and Powis, as a result of collaboration with G. Birkett of Birkett Ai ...

, 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 Gara de Nord to Străulești, following the Griviței and Bucureștii Noi avenues. History Construction of the line started in September 1989, shortly befor ...

, 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) 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 in ...

, 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 ( tr, M4 Kadıköy–Sabiha Gökçen Havalimanı metro hattı), is a , 23-station rapid transit line of the Istanbul Metro. Running between Kadıköy and Sabiha ...

, a subway line on the Asian side of Istanbul, Turkey * M4, variant of

M2 (railcar) The M2, M4 and M6 were three similar series of electric multiple unit rail cars produced by the Budd Company (M2), Tokyu Car Corporation (M4), and Morrison-Knudsen (M6) for the Metropolitan Transportation Authority (MTA) and the Connecticut Depar ...

, 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 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 had ...

, 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 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 term ...

, 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 ...

Other uses

* Héctor David Delgado Santiago (1975–2013, alias El Metro 4, sometimes M4), deceased Mexican drug lord * M4, a measure of

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

* 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 atta ...