Editing M3 (section)

=== 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