None that were made by a legitimate manufacturer. No way to tell how many individuals broke the law and made one that didn't meet mandated requirements.
No. We are still using them today, and thus, they did not become illegal.
Depending on where you are, guns are NOT illegal.
how many types of guns are there in the world?
No, cap guns are not illegal in Chicago.
Cap guns are illegal in Rhode Island.
BB guns and airsoft guns are legal, but it may be illegal to transport them, especially to handle them if they are looking like 'real' guns.
Matters what period of time you are talking about.
Hunters can kill crocodiles with shotguns and other kind of hunting guns. But it is very illegal to hunt down crocodiles in many places of the world.
Yes, of course it is illegal to bring BB guns on planes.
No they are not illegal.
No it is not, we have many paintball fields in the area.
No.