后膛枪

例句：

1. 1. The hunter used a sniper rifle to take down the deer.
   猎人使用狙击步枪射杀了那只鹿。
2. 2. The soldiers were trained to use their shotguns for defense.
   士兵们接受训练，使用他们的霰弹枪进行防御。
3. 3. The policeman was carrying a long-barreled shotgun in his hand.
   警察手里提着一支长筒猎枪。