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Definition of: submachine gun
(sub′mə·shēn′)
A lightweight, gas–operated gun, automatic or semi–automatic in action, designed for firing from the shoulder or hip.
—Thompson submachine gun An air–cooled, .45–caliber submachine gun with automatic firing action: also called Tommy gun: named for its inventor, John T. Thompson, 1860–1940, U.S. Army officer.
a. Stock.
b. Housing.
c. Barrel.
d. Trigger.
e. Trigger guard.
f. Clip.
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