noun
single-shot gun; single-loader firearm
A firearm that holds and fires only one round at a time, requiring manual reloading after each shot. Often contrasted with repeating or semi-automatic guns.
彼は単発銃で的を狙った。
He aimed at the target with a single-shot gun.
単発銃は構造が単純で信頼
Single-shot guns have a simple structure and high reliability.