While the Second Amendment provides an individual right to own a gun, this right is not absolute. The government can prevent citizens from owning weapons that have no possible law-abiding purpose, such as sawed-off shotguns. Laws also can ban certain groups of people from owning firearms, including juveniles, convicted felons, and people with mental illnesses. Furthermore, the government can restrict the locations where people can bring weapons and impose certain requirements for concealed carry permits.