noun
A short-barreled rifle; used in military and hunting contexts.
彼はカービン銃を肩に担いで森に入った。
He went into the forest with a carbine slung over his shoulder.
ライフル is a general term for a rifle, while カービン銃 specifically refers to a shorter, lighter carbine variant.
From English 'carbine' + 銃 (gun).