What is true about fully automatic firearms?

Fully automatic firearms are designed to continuously fire rounds as long as the trigger is held down, allowing for rapid and sustained fire. They are often used in military and law enforcement settings, but in many countries, including the United States, their civilian ownership is heavily regulated or prohibited. Such firearms typically require a special license to own and are subject to strict legal controls. The design and operation of fully automatic weapons differentiate them from semi-automatic firearms, which fire one round per trigger pull.