Nothing. This is America.
A felony conviction, or domestic violence conviction.
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There are additional conditions, listed in the 1968 Gun Control Act. See above
Yes. See: http://en.wikipedia.org/wiki/Domestic_Violence_Offender_Gun_Ban
Owning a gun is not illegal if you follow the laws.
She never mentioned owning a gun.
i had a look and they are illegal
Yes
Yes
Different people have different reasons. One reason is, some people believe that disallowing honest citizens from owning guns will prevent crime.
there legal
BATFE has what you are looking for.
Restrictions on owning a hand gun depends on what nation this question is being directed. In the United States the restrictions on owning a hand gun varies in each state. For example, in the state of New York, on is not allowed to own any type of gun while in Arizona one can own anything except a machine gun or army tactical weapons.
no its a criminal offence
If selling the gun is banned, then buying it before the ban is no problem. If owning the gun is banned then it does not matter when you bought it.