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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.

Blades

• M1 bayonet
• M1917 bayonet
• M4 bayonet
• Ka-bar
• Bolo knife
• Bowie knife
• United States Marine Raider stiletto
• V-42 stiletto

Small arms

Pistols (manual and semi-automatic)

Image	Name	Type	Role/s	Action	Origin	Base model/s	Manufacturer/s	Cartridge/s	Effective firing range (m)	From (year)	Estimated wartime quantity	Unloaded wt (kg)	Notes
	Colt M1911	Pistol	Sidearm	Recoil-operated (Short recoil)	United States		Colt Springfield	.45 ACP		1911		1.1
	Colt M1903	Pistol	Sidearm	Blowback, single action	United States		Colt	.32 ACP (M1903) .380 ACP (M1908)		1903		0.68
	Colt New Service revolver	Revolver	Sidearm	Double action	United States		Colt	.45 ACP, .45 Colt, .44-40 Winchester, .38-40, .44 Russian, .44 Special, .44-40, .38 Special, .357 Magnum		1909	356000
	Colt M1917 revolver	Revolver	Sidearm	Double action, rotating cylinder	United States		Colt	.45 ACP, .45 Auto Rim		1917		1.1
	Smith & Wesson M1917 revolver	Revolver	Sidearm	Double/single action, swing-out cylinder	United States		Smith & Wesson	.45 ACP, .45 Auto Rim		1917		1.0
	Colt Official Police	Revolver	Sidearm	Double action	United States		Colt	.22 Long Rifle, .32-20, .38 Special, .38/200, .41 Long Colt		1907
	Smith & Wesson Model 10 revolver	Revolver	Sidearm	Double action	United States		Smith & Wesson	.38 Long Colt, .38 Special, .38 S&W		1899		0.907

Automatic pistols and submachine guns

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 Thompson submachine gun	Submachine gun	Close-quarters, personal security	Blowback, blish lock	United States	pplicker (firearms) Blowback, blish lock	Auto-Ordnance Company	.45 ACP	150	700	1921		4.5-4.9	30-round magazine.
	M2 Hyde	Submachine gun	Close-quarters, personal security	Blowback, open bolt	United States		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.
	M3 and M3A1 submachine gun	Submachine gun	Close-quarters, personal security	Blowback, open bolt	United States		General Motors	.45 ACP	91	450	1943	655363	3.61-3.70	30-round magazine.
	M50 Reising submachine gun	Submachine gun	Close-quarters, personal security	Blowback (Delayed blowback), closed bolt	United States		Harrington & Richardson	.45 ACP		550	1941		2.8-3.1
	United Defense M42	Submachine gun	Close-quarters, personal security	Blowback	United States		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)
	M55 Reising submachine gun	Submachine gun	Close-quarters, personal security	Blowback (Delayed blowback), closed bolt	United States		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.

Rifles

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Image	Name	Type	Role/s	Action	Origin	Base model/s	Manufacturer/s	Cartridge/s	Effective firing range (m)	From (year)	Estimated wartime quantity	Unloaded weight (kg)	Notes
	M1903 Springfield	Standard rifle	Front-line	Bolt-action	United States	Gewehr 98	Springfield Armory	.30-03; .30-06 Springfield	610	1903	3000000~	3.9
	M1903A4 sniper rifle	Sniper rifle	Long-Range Precision	Bolt-action	United States	Gewehr 98	Springfield Armory	.30-03; .30-06 Springfield	1000	1903