A double-barreled rifle is like having two guns in one. It's a special kind of gun that has two barrels sitting next to each other. When you shoot it, you can shoot both barrels at once or one barrel at a time.
Think of it like having two straws to drink from at the same time. Except instead of straws, it's two parts of the gun that shoot bullets.
This type of gun is usually used for hunting big animals, like deer or wild boar, or for sport shooting. It's important to always be careful when handling guns, even if they have two barrels. Remember to follow all safety rules and only use a gun if you have been properly trained.