Is firing a gun across state lines a federal offense?

Yes, firing a gun across state lines can be considered a federal offense, particularly if it involves illegal possession or use of a firearm. Federal Laws, such as the Gun Control Act, regulate the transportation and possession of firearms across state lines. Additionally, if the act violates interstate commerce laws or involves the use of a firearm in the commission of a federal crime, it may lead to federal charges. However, the specific circumstances and state laws also play a significant role in determining the legality of such actions.