No, you will not be able to put the airsoft gun on a remote control plane and shoot remotely.
no
To make an RC airplane capable for airsoft combat you would need an airsoft machine gun and an RC plane. you would need to find a way to trigger the gun remotely and then mount it to the plane. If you are technicly inclined you could modify the plane to use its radio controll to fire the gun, I would not advise just attaching a gun to a plane because it would be to heavy but taking it apart and mounting the barrel and the motor on the plane.
An Airsoft gun
A pump airsoft gun is a gun that has to be pumped every time before shooting. Ex. Airsoft shotgun
No
i believe it is around 12
Well its illegal to have airsoft guns in city limits but if you want to bring your airsoft gun in highly populated areas you might get fined or probobly arrested.
No
It is an airsoft gun based of the PPSH-41 gun
If it was properly stored, and not sticking out for all the world to see, then yes.
If you want to be sure, treat it and declare it as a firearm.