Which of the following firearms is illegal to own without specific permits in South Dakota?

In South Dakota, owning a machine gun without specific permits is illegal. Machine guns are heavily regulated at both the federal and state levels due to their ability to fire multiple rounds with a single pull of the trigger. Individuals looking to own a machine gun must apply for the appropriate permits and undergo a thorough background check to ensure they meet all legal requirements. Handguns, shotguns, and rifles are generally legal to own in South Dakota for individuals who meet the necessary criteria and follow the state's firearm laws.