銃器 is read as じゅうき (juuki) and means small arms.
じゅうき
juuki
じゅうかき
firearm
じゅうさつ
death by shooting
じゅうげき
shooting
じゅう
gun
じゅうせい
sound of a gunshot
じゅうだん
bullet (from a rifle)
じゅうこう
gun point
じゅうしん
gun barrel
じゅうほう
guns
じゅうか
gunfire
じゅうけん
bayonet
じゅうきせいほう
gun control law