noun
anti-tank weapons
Military term covering portable or crew-served weapons designed to destroy armored vehicles.
歩兵部隊は対戦車火器を携行していた。
The infantry unit was carrying anti-tank weapons.
Similar meaning, but 火器 specifically refers to firearms or weapons using explosive force, while 兵器 is a broader term for weapons.
Compound of 対 (anti-), 戦車 (tank), and 火器 (firearm).