You can pimp your airsoft gun yourself or you can ask some help from an airsoftsmith nearby. The most important thing in pimping your airsoft gun is YOUR CONCEPT, internal and external. Without a good concept, pimping your airsoft gun is such a waste. What style do you want? A government issue M4A1? Taliban's AK-47? Gunslinger style GBB? PMC's AK SOPMOD? Or just an usual AEG with craziest ROF and fps ever? It's up to you. You can try pimpmygun.doctornoob.com. This website can help you to design the look you want for your AEG/GBBR.
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
You never need a license to have an Airsoft gun.
No
NO
No, it is an airsoft gun.
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.
kwa all the way