- m – metre(s)
- m/s – metres per second
- MAB – Marine Amphibious Brigade
- MABS – Marine Air Base Squadron
- MAC – Medium Armored Car (US)
- MAC – Military Airlift Command
- MACS – Modular Artillery Charge System
- MACS – Marine Air Control Squadron
- MADLS – Mobile Air Defence Launching System
- MAF – Marine Amphibious Force
- MAG – Marine Aircraft Group
- MAGTEC – Marine Air/Ground Training & Education Command
- MAGTF – Marine Air/Ground Task Force
- MAHEM - Magnetohydrodynamic Explosive Munition
- MALOS – Miniature Laser Optical Sight
- MALS – Marine Air Logistics Squadron
- MAMBA – Mobile Artillery Monitoring Battlefield Radar
- MANPADS – Man Portable Air Defense System
- MAOV – Mobile Artillery Observation Vehicle
- MAP – Military Aid Programme
- MAPS – Modular Azimuth Position System
- MAR – Micro Assault Rifle
- MARDI – Mobile Advanced Robotics Defence Initiative (UK)
- MARDIV – Marine Division (US)
- MARS – Military Amateur Radio Station
- MARS – Mini Assault Rifle System
- MARS – Multi-purpose Aiming Reflex Sight
- MARS – Multiple Artillery Rocket System
- MASS – Marine Air Support Squadron
- MATCS – Marine Air Traffic Control Squadron
- MATSG – Marine Air Training Support Group
- MAU(SOC) – Marine Amphibious Unit (Special Operations Capable)
- MAV – maintenance assist vehicle
- MAVD – MLRS Aim Verification Device
- MAW – Marine Air Wing (US)
- MBA – main battle area
- MBB – Messerschmitt-Bцlkow-Blohm
- MBC – Mortar Ballistic Computer
- MBT – main battle tank
- MCLOS – Manual Command to Line Of Sight
- MCRV – Mechanised Combat Repair Vehicle
- MCS – Microclimate Conditioning System
- MCS – modular charge system
- MCSK – Mine Clearance System Kit (US)
- MCT – Medium Combat Tractor (US)
- MCT – Mercury Cadmium Telluride
- MCV – Mechanised Combat Vehicle
- MCWL – Marine Corps Warfighting Laboratory
- MCWS – Minor Calibre Weapons Station (US)
- MDMP – Military Decision Making Process
- MDU – Map Display Unit
- MEB – Marine Expeditionary Brigade
- MEDEVAC – Medical Evacuation
- MEF – Marine Expeditionary Force
- MENS – Mission Element Need Statement (US)
- MEP – Modular Explosive Penetrator
- MEPSMilitary Entrance Processing Station
- METO – Middle East Treaty Organisation; CENTO or Baghdad Pact
- METL – Mission Essential Task List
- METT-TC – Mission, Enemy, Terrain and weather, Troops and support available—Time available, Civilians
- MEU(SOC) – Marine Expeditionary Unit (Special Operations Capable)
- MEV – medical evacuation vehicle (US)
- MEWS – Mobile Electronic Warfare System
- MEWSS – Mobile Electronic Warfare Support System
- MF – multifunction
- MFC – Mortar Fire Control(ler)
- MFCS – Multi-Fire Control System/Mortar Fore Control System
- MFCV – Missile Fire-Control Vehicle
- MFF – munition filling factory
- MG – machine gun
- MGB – Medium Girder Bridge
- MGL – Multiple Grenade Launcher
- MGS – Mobile Gun System
- MGTS – MultiGun Turret System
- MGU – Mid-course Guidance Unit
- MI – Military Intelligence
- MIA – Missing In Action
- MICOM – Missile Command (US)
- MICV – mechanised infantry combat vehicle
- MILAN – Missile d'Infantrie Léger Antichar (light infantry anti-tank missile)
- MILES – Multiple Integrated Laser Engagement System (US)
- MILSPEC – Military Specification
- MILSTAN – MILitary STANdard
- MILSTAR – MILitary Strategic and Tactical Relay (US)
- MIPS – Medium Integrated Propulsion System (US)
- MLA – Manufacturing Licence Agreement
- MLC – Military Load Class
- MLC – Modular Load Carrier
- MLF – Marine Logistics Force
- MLR – Marine Logistics Regiment
- MLI – Mid-Life Improvement
- MLO – Muzzle Loaded Ordnance
- MLRS – Multiple Launch Rocket System (US)
- mm – millimetre(s)
- MMBF – mean miles between failures
- MMG – Medium Machine Gun
- MMS – mast-mounted sight
- MMS – Modular Mounting System
- MNVD – Monocular Night Vision Device
- MoA – Memorandum of Agreement
- MOA – Minute Of Angle
- MoD – Ministry of Defence
- MODA – Ministry of Defence and Aviation
- MOLF – Modular Laser Fire Control (Germany)
- MOLLE – MOdular Lightweight Load-carrying Equipment
- MOPP – Mission Oriented Protective Posture (US)
- MOS – Military Occupational Specialty (US)
- MoU – Memorandum of Understanding
- MOUT – Military Operations in Urban Terrain (urban warfare) (US)
- MP – Machine Pistol
- MPBAV – MultiPurpose Base Armoured Vehicle
- MPC – MultiPurpose Carrier (Netherlands)
- MPGS – Mobile Protected Gun System (US)
- MPI – Mean Point of Impact
- MPIM – MultiPurpose Individual Munition
- MPM – MultiPurpose Munition
- MPS – Maritime Prepositioning Ships (US)
- MPV – Multi-Purpose Vehicle
- MPWS – Mobile Protected Weapon System (US)
- MR – Medium Range
- MRAP – Mine Resistant Ambush Protected (Vehicle)
- MRAR – MultiRole Assault Round
- MRAV – MultiRole Armoured Vehicle
- MRBF – mean rounds before failure
- MRBS – mean rounds between stoppages
- MRE – Meal Ready to Eat
- MRS – multiple rocket system
- MRS – muzzle reference system
- MRSI – Multiple Round Simultaneous Impact
- MRV(R) – Mechanised Recovery Vehicle (Repair)
- MRVR – Mechanised Repair and Recovery Vehicle (US)
- MSSG – MAU/MEU Service Support Group (USMC)
- MSR – Missile Simulation Round
- MSR – Main Supply Route
- MSTAR – Man-portable Surveillance and Target Acquisition Radar
- MSV – Modular Support Vehicle
- MT – mechanical time
- MTB – Mobility TestBed
- MTBF – Mean Time Between Failure
- MTI – moving target indication
- MTL – Materials Technology Laboratory (US)
- MTR – Mobile Test Rig (US)
- MTSQ – mechanical time and super-quick
- MTSQ – Mechanical Time Semi-Quick
- MTU – Motoren- und Turbinen-Union
- MTVL – mobile tactical vehicle light
- MUGS – Multipurpose Universal Gunner Sight
- MULE – Modular Universal Laser Equipment (US)
- MUSS – Multifunctional Selfprotection System
- MV – muzzle velocity
- MVEE – Military Vehicles and Engineering Establishment (UK)
- MVRS – Muzzle Velocity Radar System
- MWCS – Marine Wing Communications Squadron
- MWHS – Marine Wing Headquarters Squadron
- MWS – Manned Weapon Station (US)
- MWS – Modular Weapon System
- MWSG – Marine Wing Support Group
- MWSS – Marine Wing Support Squadron
Read more about this topic: Glossary Of Military Abbreviations