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For historical information, Wikipedia has an article on M3 submachine gun.
M3A1 submachine gun
Type Submachine gun
Users United States
Firing mode Automatic
Magazine size 30

The M3 submachine gun is an American submachine gun.


The M3 submachine gun was designed and produced with the intention to replace the Thompson submachine gun with lower cost and weight. It was often nicknamed the "Grease Gun" due to its similar appearance to the mechanic's tool. Unforeseen delays in production and changes in specification caused the M3 to make a late debut in the war, and it did not replace the Thompson in active service.

In Battlegroup42, the M3A1 submachine gun is the primary weapon of the American medic class in the Pacific theatre.

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