Final answer:
The regulation regarding fully automatic rifles in the United States is governed by federal and state laws. The Second Amendment protects the right to keep and bear arms, but this right is not absolute and can be regulated. United States v. Miller upheld restrictions on certain types of firearms based on the promotion of a well-regulated militia.
Step-by-step explanation:
The regulation regarding fully automatic rifles in the United States is governed by federal and state laws. According to United States v. Miller (1939), the federal government and states can limit access to weapons that do not have a reasonable relationship to the preservation or efficiency of a well-regulated militia. The Second Amendment of the United States Constitution protects the right of the people to keep and bear arms, but this right is not absolute and can be regulated.
In the 1930s, federal gun control laws were introduced in response to organized crime, and stricter laws were enacted in the 1960s. Background checks for prospective gun buyers were implemented in the 1980s. The Supreme Court's interpretation of the Second Amendment has been debated, but United States v. Miller upheld restrictions on certain types of firearms on the basis of not promoting a well-regulated militia. It is important to note that laws and regulations regarding fully automatic rifles may vary from state to state.