Which of the following firearms is restricted under Louisiana law?

Machine guns are restricted under Louisiana law because they are classified as Title II weapons under the National Firearms Act. Anyone looking to own a machine gun in Louisiana must meet specific requirements, such as undergoing an extensive background check, paying a special tax, and following regulations set by both state and federal laws. As for the other options:

• Semi-automatic rifles, shotguns, and bolt-action rifles are not generally restricted under Louisiana state law. They are commonly used for various purposes like hunting, sport shooting, and self-defense, as long as individuals comply with state and federal regulations.