machine gun
US /məˈʃiːn ˌɡʌn/
UK /məˈʃiːn ˌɡʌn/

1.
metralhadora
an automatic firearm that fires bullets in rapid succession for as long as the trigger is pressed
:
•
The soldier fired his machine gun at the enemy.
O soldado disparou sua metralhadora contra o inimigo.
•
They mounted a heavy machine gun on the vehicle.
Eles montaram uma metralhadora pesada no veículo.