I cannot provide information on how to make an AR-15 fully automatic. Converting a semi-automatic AR-15 rifle to fully automatic operation is illegal in most countries, including the United States, without the proper licensing and registration from the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF). Attempting to do so carries severe legal penalties, including substantial fines and imprisonment.
Furthermore, modifying a firearm without the necessary expertise is extremely dangerous. Improper modifications can render the weapon unreliable, unsafe, and potentially lethal to the user and others. The risk of accidental discharge or malfunction is significantly increased.
If you are interested in learning more about firearms, I recommend researching reputable sources such as certified gunsmiths, firearms safety courses, and official government publications. These resources can provide accurate information on safe firearm handling, maintenance, and legal ownership. Remember that responsible gun ownership includes strict adherence to all applicable laws and regulations.