submachine gun
US /ˈsʌb.mə.ʃiːn ˌɡʌn/
UK /ˈsʌb.mə.ʃiːn ˌɡʌn/

1.
pistolet maszynowy, pm
a light automatic gun firing pistol-caliber ammunition, designed for close-quarters combat.
:
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The police officer carried a submachine gun during the raid.
Policjant niósł pistolet maszynowy podczas nalotu.
•
The soldiers were equipped with rifles and submachine guns.
Żołnierze byli wyposażeni w karabiny i pistolety maszynowe.