Editing M3 (section)

=== 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