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The following is a list of World War II weapons of the United States, which includes firearm, artillery, vehicles, vessels, and other support equipment known to have been used by the United States Armed Forces—namely the United States Army, United States Army Air Forces, United States Marine Corps, United States Navy, and United States Coast Guard—as well as the Office of Strategic Services and other U.S. government agencies involved in the war, during American involvement between 1941 and 1945. This list includes experimental technology that, while created during the war, was never issued as intended.
| Image | Name | Type | Role/s | Action | Origin | Base model/s | Manufacturer/s | Cartridge/s | Effective firing range (m) | Cyclic rate of fire (rpm) | From (year) | Estimated wartime quantity | Unloaded wt (kg) | Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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M1 Thompson submachine gun | Submachine gun | Close-quarters, personal security | Blowback, blish lock |  United States
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pplicker (firearms) Blowback, blish lock | Auto-Ordnance Company | .45 ACP | 150 | 700 | 1921 | 4.5-4.9 | 30-round magazine. | |
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M2 Hyde | Submachine gun | Close-quarters, personal security | Blowback, open bolt | United States
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Marlin firearms company | .45 ACP | 570 | 1942 | 400 | 4.19 | Never issued or saw service. The M2 Hyde was the gap between the M1 Thompson and the M3 grease gun. It was designed to be lighter and cheaper to produce than the Thompson (since the Thompson was an extremely expensive weapon). It succeeded at both goals, but it was almost immediately replaced by the cheaper grease gun. Used 20-round or 30-round Thompson magazines. | ||
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M3 and M3A1 submachine gun | Submachine gun | Close-quarters, personal security | Blowback, open bolt | United States
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General Motors | .45 ACP | 91 | 450 | 1943 | 655363 | 3.61-3.70 | 30-round magazine. | |
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M50 Reising submachine gun | Submachine gun | Close-quarters, personal security | Blowback (Delayed blowback), closed bolt | United States
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Harrington & Richardson | .45 ACP | 550 | 1941 | 2.8-3.1 | ||||
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United Defense M42 | Submachine gun | Close-quarters, personal security | Blowback | United States
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United Defense Supply Corp. | .45 ACP | 700 | 1942 | 15000 | 4.54 | 25-round box magazine (also issued with two 25-round magazines welded face-to-face) | ||
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M55 Reising submachine gun | Submachine gun | Close-quarters, personal security | Blowback (Delayed blowback), closed bolt | United States
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Harrington & Richardson | .45 ACP | 550 | 1941 | Identical to the M50 SMG except it sported a wire stock and had no compensator. It also had a slightly shorter barrel. The M50 and M55 served as the go-to SMGs before the Thompson. |
| Image | Name | Type | Role/s | Action | Origin | Base model/s | Manufacturer/s | Cartridge/s | Effective firing range (m) | Cyclic rate of fire (rpm) | From (year) | Estimated wartime quantity | Unloaded wt (kg) | Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
M1 carbine | Carbine | Front-line / Assault / Close-quarters / Personal Security | Gas-operated (short-stroke piston), rotating bolt |  United States
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General Motors, Winchester, Irwin-Pedersen, Underwood Elliot Fisher, National Postal Meter, Quality Hardware Manufacturing Corp., International Business Machines, Standard Products, Rock-Ola Manufacturing Corporation, Commercial Controls Corporation | .30 Carbine | 275 | 270 | 1942 | 6121309 | 2.4 | 15-round box magazines, or 30-round curved magazines.
A common practice was to strap two 15-round magazine ammo pouches to the gun stock. | |
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Marlin Model 1894 | Carbine | Close-quarters / Personal Security | Lever action | United States
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Marlin Firearms | 30-30 | 137-183 | 91 | 1894 | 2.72 - 2.95 | |||
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Winchester Model 1894 | Carbine | Close-quarters / Personal Security | Lever action | United States
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Winchester | 30-30 | 137-183 | 91 | 1894 | 3.1 |
