noun
firearms; guns
General term for portable firearms and similar weapons that use gunpowder or explosives.
警察は容疑者から火器を押収した。
The police seized firearms from the suspect.
この地域では火器の所持が厳しく規制されている。
Possession of firearms is strictly regulated in this area.
Compound of 火 (fire) and 器 (tool, instrument), literally 'fire tool'. The term has been used since the introduction of firearms to Japan to refer to weapons that use fire or gunpowder.