Keep it clean and get a stronger spring.
Yes.
no. Airsoft guns could not possibly shoot that fast.
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!
Because you, my friend, have a broken airsoft gun.
With a tight bore barrel and sealed nozzle and higher spring
You need to lubricate and clean it.
A gun that cocks back automatically after you shoot.
No. Paintballs are much MUCH larger than airsoft pellets (.50-inch and higher), the guns' feed mechanisms are completely different.
Depends on the laws
no, it doesn't
YES
NO- they shoot large diameter plastic BBs. In general, they do not have the power of the traditional BB gun.