Editing M3 (section)

== Military ==

=== Weapons ===
* [[37 mm Gun M3]], a light American anti-tank gun
* M3/M3E1 Multi-role Anti-armor Anti-tank Weapon System (MAAWS) (AKA: [[Carl Gustaf 8.4cm recoilless rifle]]), an 84&nbsp;mm man-portable reloadable anti-tank recoilless rifle 
* [[90 mm Gun M1/M2/M3]], an American anti-aircraft and anti-tank gun
* [[105 mm Howitzer M3]], an American light artillery piece
* [[Benelli M3 Super 90]], an Italian semi-automatic shotgun
* [[M3 20mm cannon]], a United States development of the Hispano-Suiza HS.404
* [[M3 fighting knife]], a World War II American issue knife
* [[M3 machine gun]], a variant of the M2 Browning
* [[M3 submachine gun]] (AKA: Grease Gun), an American submachine gun
* [[M3 tripod]], a modern tripod for the M2 Browning machine gun
* M3, a code name for a United States military mission at [[Roosevelt Roads Naval Station]] in Puerto Rico

=== Vehicles ===
* [[M3 Amphibious Rig]], a German self-propelled amphibious bridging vehicle
* [[M3 Bradley]], an American infantry fighting vehicle
* [[M3 Gun Motor Carriage]], American tank destroyer
* [[M3 half-track]], an armored military vehicle
* [[M3 Lee]], an American medium tank; also known as "M3 Grant" in Commonwealth service
* [[Panhard M3]] PTT, a French armored personnel carrier
* {{ship|HMS|Raglan}} (M3), a WWI British Royal Navy monitor
* [[M3 Ram]], a Canadian cruiser tank
* [[M3 Scout Car]], an American armored vehicle
* [[M3 Stuart]], an American light tank
* {{ship|HSwMS|Visborg|M03}}, a Swedish Royal Navy mine layer
* {{ship|HSwMS|M3}}, a [[List of mine warfare vessels of the Swedish Navy|Swedish Navy mine sweeper]] (1940–1955)
* {{ship|HMS|M3|1918|6}}, a British Royal Navy minelayer submarine of the post-WWI period