If you knew it was stolen, you could be charged with a crime. If you didn't know and subsequently find out, you should turn it in to the police. You are out your money, but, the rightful owner should get their property back.
You have the right to remain silent. Anything you say can and will be used against you in a court of law. You have the right to have an attorney present during questioning. If you cannot afford an attorney, one will be appointed for you. Do you understand these rights?
In most states, if you purchased the stolen item from a dealer who normally does business in that commodity, you acquire clear title to the item. Firearms can be treated differently in some states.
The biggest problem is that if you are caught with the stolen gun, you will be a suspect in its theft. You will also be a suspect in any crimes that may have been committed with it. That could lead to questioning, 48 hour holds, search warrants, and all kinds of things you don't want. If you don't have the right to possess a gun, it gets much worse for you. So if you bought a stolen gun, the best thing you can do is return it to the rightful owner.
Convicted felons can sometimes get their gun rights restored. Check with a local attorney familiar with the process.
what gun are we talking about here
Not sure exactly what you are asking. If you mean, after getting a felony how long is it before you can purchase a gun, the answer is, never, unless you have your rights restored, which you can only do under limited circumstances.
Contact your local police department and give them the serial number. The Police can check on the stolen gun list maintained by the BATFE. If the gun is stolen, the Police will conficate the piece and begin investigation of how it was acquired.
Contact the police.
Expect the police to expect YOU to explain how you came to possess a gun that had been stolen- just like any other property.
Depends on the DA.
Take it to your local police
Until it is recovered.
Ask a police officer
A Stolen gun
It is possible.