Day of Defeat Wiki

The M3 Grease Gun is a submachine gun only available in Day of Defeat.


The M3 is an American .45 ACP submachine gun adopted by the U.S. Army on 12 December 1942, as the United States Submachine Gun, Cal. .45, M3. The M3 was chambered for the same .45 ACP round fired by the Thompson submachine gun, but was cheaper to mass produce and lighter, at the expense of accuracy. The M3 was commonly referred to as the "Grease Gun" or simply "the Greaser," owing to its visual similarity to the mechanic's tool.

Considering the manufacturing problems of the Thompson, the Ordnance Department began to look for a cheaper replacement as early as 1941.  Numerous trials were held, including tests of the British "Sten" submachine gun.  The overall winner of these tests was dubbed the "M3A1 Submachine gun", or "Greasegun."  The weapon was made entirely of stamped metal, making it incredibly cheap and easy to mass produce.  The Greasegun was supplied to troops that could not get a Thompson, and was especially popular with tank crewman, since its small size allowed it to fit inside crew compartments.

Game Tips: The M3A1 Greasegun is nearly identical to the Thompson, the main difference being the Greasegun’s slower rate of fire.  Although it doesn’t spray as much lead as the Thompson does, its slower rate of fire allows a player to conserve ammunition.  The Greasegun is very useful in the prone firing position – its accuracy will allow an easy headshot.


  • The M3 has a lower rate of fire compared to the M1 Thompson, which makes it easier to control.
  • Use this if you're starting out and need to learn how to control recoil on automatic weapons.
  • This weapon is designed for middle range combat. Do not use it in close quarter combat.


Weapons of Day of Defeat
Rifle Bolt-action Kar98kSpringfieldLee-Enfield
Semi-auto M1 GarandM1 CarbineK43
Machine Guns Sub MP40M1 ThompsonStenM3
Light BARMP44FG42Bren
Medium Browning M1919MG34MG42
Explosives Launcher BazookaPanzerschreckPIATMortar
Grenade Mk 2StielhandgranateMills Bomb
Misc. Sidearms M1911LugerWebley
Melee SatchelSpadeKnife