Daisy takes the credit for the first modern BB gun that uses the 4.4mm BB around 1900. However air guns were around before that. Lewis and Clark carried an Air Rifle on the 1803-1806 expedition with them. It was thought to be a "Girandoni system" PCP rifle. Bartholomaus Giarandoni developed it around 1780. It fired 22 times on one charge, lead balls were 0.462" caliber.
First of all you need to state where you live. The law is different, depending on the country where you live. Are you asking about metal BB's or airsoft BB's?
21
Your parents will decide.
The compressed air gun, which shot metal bb's was invented before the paint marking gun.
It all depends on the law where you live.
18 to purchase
If its a BB Gun, Then Yes.
The oldest known air rifle gun was invented by Girandoni of Vienna about 1780, for the Austrian Army. Daisy is credited for invented the first BB gun around 1895.
You need to take this question up with the child's parents.
The Red Ryder BB gun was first produced in 1938, and continues in production to this day. If you're looking for specific dates, you may wish to contact Daisy (see related link).
18 years old
You must be 18 Years old to purchase one