More information about the M3 and M3A1 Submachine Gun is available at the linked page.
M3 .45 cal. submachine gun cut away to show internal parts. The external cocking lever clearly distinguishes this model from the M3A1.
In the hedgerows of Lower Normandy during the summer 1944, an American Soldier holds his M3A1 .45 cal. submachine gun (partly obscured by the water line of an M1917 machine gun).
28th Infantry Div Soldiers march down a street in Bastogne, Belgium to take up security positions, December 1944. Soldier at the left front carries an M3A1 .45 cal. submachine gun and an M1 Carbine.
Tenth Mountain Division soldiers board ship on their way to Italy, January 1945. The Soldier to the right carries an M3 .45 cal. submachine gun.
M3 .45 cal. submachine guns carried by Soldiers going overseas from Hampton Roads Port of Embarcation, Newport News, VA during WWII.
6th Armored Div Soldier aims his M3 .45 cal. submachine gun at two German prisoners, Plouay, France, 28 August 1944.
U.S. Marine fires his M3 .45 cal. submachine gun on North Korean forces, Seoul, Korea, 20 September 1950.
Montagnard Scouts, trained by U.S. Special Forces and the CIA, armed with M3A1 submachine guns, at their training center, Pleiyit, Pleiku Province, Vietnam, circa 1963-1964.
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