Depends on what registration process (if ANY) is used where you live. In MOST of the US, there is no registration of ordinary rifles, shotguns, or handguns.
Since they are not registered, there is no way to answer your question. In the US, MOST guns are not registered- there is no law requiring that guns be registered. It is a popular misconception that there IS such a requirement, but there is none on a Federal level.
Not unless you are a LEO and have a valid reason to know.
No
No.
Like most of the US, there is no registration of guns in Texas.
You cant'.
No- see link below.
No, but gun owners do.
In most U.S. states, there is no registration.
Many places don't require it.
None. When made, 99.9% are legal, no matter where made. Just because it's against the law for YOU to own it doesn't make the weapon illegal. Technically the above is correct however as guns are not required to be registered in all states it is impossible to say how many are owned legally. Guns that are owned illegally are obviously not registered so there is no way to know how many there are.
It depends on the country where you live. Where I live pellet guns don't have to be registered.