rifled barrel

例句：

1. 1. The soldier was found with a rifled barrel in his hand.
   士兵被发现手里拿着一支步枪筒。
2. 2. The rifle was fitted with a rifled barrel for better accuracy.
   这把步枪配有步枪筒，以获得更好的精度。
3. 3. The hunter used a rifled barrel to shoot at the deer.
   猎人使用步枪筒射击那只鹿。