It may depend on the state you live in. As a generalstatement a convicted felon usually loses the right to vote - hold political office - own or possess firearms - and in the case of convicted sex offenders you may have restrictions on where you may reside.
Not legally...
No.
Legally no. Illegally yes ;)
The most basic answer is no, if you have a felony, you cannot legally buy a handgun, regardless of the age. However, it is possible to sometimes have some of your rights restored, so you may want to check with a local attorney familiar with that process.
Generally speaking, no. If you have a felony, you cannot legally own or purchase a gun.
No. You are forbidden to legally posess a firearm and your record always follows you.
Felony charges ANYWHERE never go away unless they are legally "expunged."
In the U.S. you cannot legally own a gun if you have a felony on your record, unless your rights have been restored.
Legally, yes, but good luck getting the votes.
Laws vary from state to state, but in most jurisdictions you cannot legally own a gun if you have been convicted of a felony, unless your gun rights have been legally restored.
No
No. You cannot legally possess a firearm.