Can a bar owner carry gun in his bar?

It depends on the state and local laws where the bar is located. In general, it is not illegal for a bar owner to carry a gun in their establishment, but they may need a permit to do so. Some states have laws that specifically prohibit the possession of firearms in bars, while others may have laws that allow the bar owner to carry a firearm but require them to meet certain criteria, such as having a concealed carry permit and demonstrating a need to carry the firearm for self-defense. It is important to consult the specific laws in the jurisdiction where the bar is located to determine whether a bar owner can legally carry a gun in their establishment.