Airsoft guns are usually not free, however airsoft websites provide deals for very cheap airsoft guns.
Example: see related link
There is no "free airsoft guns". You pay for your passion.
I know of NO Propane air soft guns. Air soft and Air guns can use AIR, C02, Nitrogen and Greengas. All are safe to use.
Air Soft guns. Yes
Air soft guns are popular over the nation. Do not use one if you are not at least 15 :).
the gas powered air soft guns use CO2 or green gas
No.
No
In bonerland
the best brand of air soft guns are...crossman,remington,smith & weson,and echo 1.
stingers are Airsoft guns
Yes
no if you live in the us