noun, feminine/mi.tʁa.jɛt/plural: mitraillettes
submachine gun; sandwich with meat and French fries
“Dans les trois jours, voilà le tac, tac, tac / Des mitraillettes qui reviennent à l'attaque” — Within three days, there's the rat-a-tat-tat / Of machine guns [literally "submachine guns"] back on the attack
From mitrailleuse, with substitution of suffix (mitrailler + -ette).