The best way - go to near airsoft workshop, give them money and tell what do you want.
If you decide to modify airsoft gun by yourself - be warned, this may ruin your gun and even be dangerous to your health.
An Airsoft gun
A pump airsoft gun is a gun that has to be pumped every time before shooting. Ex. Airsoft shotgun
No
No
It is an airsoft gun based of the PPSH-41 gun
Definitely, they are very fun to have wars with and you can use them indoors unlike airsoft and paintball. They are also a lot cheaper and they are easy and fun to modify.
You never need a license to have an Airsoft gun.
No
No, it is an airsoft gun.
NO
If you use airsoft gun in public place or pretend it's a real gun - yes, you can be shoot. Do not use airsoft guns in public places!
It stands for Airsoft Gun Manafacturer.