What is the legal age to use an air gun on your own land?

You don't need a specific age, but it says on the package that you have to be a specific age to shoot the air-gun, usually 15-18 depending on how strong the air-gun is.

and if its on your own land, you can generally be any age, just so long by land you mean your own property.how old do have to be to own land in Ala