Depends on which laws. The US Congress is in charge of Federal laws, and the State legislature in in charge of State laws.
Provided you are not in violation of the local, state and federal laws, yes.
For the federal laws - the US COngress. For the individual states - their state legislatures.
If all appropriate state, federal and local laws are followed, yes.
depends on where you are, and what the charge is. Frankly, you need a lawyer, not WikiAnswers. Violation of Federal guns laws in the US can carry up to 10 years in a Federal prison.
Your question asks for an opinion. My opinion is that gun control laws are based on a flawed belief that a person who will break laws regarding murder, robbery and rape will obey another law that says they may not have a gun. There are already about 20,000 Federal, State, and local gun laws on the books in the US. Gun control laws frequently do little except keep law abiding people from being able to defend themselves.
Depends to some extent on the laws where you live- and you did not share your location with us. In the US, under Federal law (which applies to ALL states) you must be 21 to purchase a handgun from a dealer. In SOME states, you may purchase a handgun from a private citizen at age 18 and above. Other states require that you be 21.
Literally, tens if not hundreds of thousands of laws. My copy of US state gun laws is about 2 inches thick. It is estimated that there are more than 20,000 gun laws in the US- and you are asking about "around the world".
In the US, firearms sales are regulated by federal and state laws. There is no "license" required to purchase firearms under federal law. Sales between private individuals are not regulated by Federal law, so a person can purchase a firearm privately from another individual. HOWEVER, state laws vary and must be complied with, and some states require a permit to purchase a handgun whether from a private party or from a dealer. Sales of firerms from a dealer are regulated and require a background check called a NICS check. This is a one time process per purchase and the record of the check are not kept permananetly, or not supposed to be kept. so, a firearm can pbe purchased from anyone, there is no 'license", and state laws should be observed.
State laws are passed by the individual state legislatures, federal law is passed by the US Congress.
The correct order of the ladder of laws in the US from top to bottom is: the US Constitution, federal laws (including treaties), state constitutions, and state laws. The Supremacy Clause establishes that the US Constitution is the supreme law of the land, followed by federal laws and treaties.
Not if you are a convicted felon. Federal law prohibits convicted felons from owning or possessing firearms ANYWHERE in the US or its possessions. It is a federal offense and state laws do not enter into it.