Will there be any issues if i have to use the gun to stop a threat? Like will my dad get in trouble or have a chance of being sued for letting me borrow it compared to me purchasing it?
YES. There will ALWAYS be "issues" if you use lethal force to stop a threat.
Even if you are 45 years old, bought the gun from an FFL, have a Concealed Handgun Permit, and have never had so much as a traffic ticket--there WILL be "issues"...
Using lethal force is NEVER a "cut and dry" situation with the law. There WILL be an investigation. You WILL be arrested. Your gun WILL be confiscated. You WILL have to hire an attorney, and it WILL most likely be expensive.
But if it is TOTALLY justified, you will probably be free in a matter of hours, and you will eventually get your gun back.
However, in NC, the BG's family CAN sue you for civil damages, and that can get REALLY expensive, because even if they lose the suit, you're STILL going to have to hire a lawyer...
So, essentially, it doesn't matter WHO the gun belongs to, as long as you can 1) legally possess a firearm, 2) were carrying it in a legal manner, 3) used it in a lawful manner, and 4) you did NOT start the situation with your own actions, or were in any way in the wrong.
Best case scenario: you get cuffed, your gun is seized, and you take a ride downtown to give a statement, and are then released while they investigate, and eventually clear you of any wrongdoing.
If you have to use your firearm in a self defense situation, who the gun belongs to is going to be the LEAST of your worries (if the gun is legit, and you can legally possess it)...
Am I trying to scare you with all this?
YOU BET...
Why all the fear and doom? Because carrying a gun is
SERIOUS BUSINESS, and you'd better be DAMN SURE you are mature enough, responsible, level-headed, and educated as to your rights and the law BEFORE you carry.