Not in the US. If you have been convicted of a felony, it is a violation of Federal law to POSSESS a firearm. Own, yes, possess, no. Covered in 18 US Cobde, section 922.
You will have to retain a lawyer to get a correct, legal and current answer.
No. Not until a final adjudication.
If you are legally "Convicted" then Adjudication IS NOT Withheld....the whole reason for a Judge to have the option of Adj With is to stop short of convicting....IF you have a felony charge - and adjudication is withheld - you are not convicted....
If a person has a felony you cannot own a gun. It does not matter how long you have had the felony.
No
No
Yes
No. No convicted felon can ever lawfully be in possession of a firearm.
Never
No.
No. If you are a convicted felon then you can not possess a firearm. However if the adjudication of guilt was withheld then you may be able to file to have the charge sealed and be eligible at that time to possess one.
No. Federal Law says that anyone convicted of a Felony is ineligible to own a firearm under the Brady Handgun Violence Prevention Act.