Only some need c02 cartridges in them, but most don't need air, no.
Air Soft guns. Yes
Air soft guns are popular over the nation. Do not use one if you are not at least 15 :).
There is no licencing anywhere for airsoft guns.
the gas powered air soft guns use CO2 or green gas
No
No.
In bonerland
yes unless it runs on gas, but guns come with the spring
the best brand of air soft guns are...crossman,remington,smith & weson,and echo 1.
stingers are Airsoft guns
yes it does
no if you live in the us