Definitely. Always wear a lower half face mask with full seal goggles or a full face paintball style mask for best protection. If you watch videos from milsimjunkie.com, you can see that people chipped their teeth multiple times (and the place where he is recording has a 400 fps limit, so the guns aren't insanely powerful).
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.
Chip.
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.