I am not an attorney, and I don't play one on the Internet. I strongly advice you one and all to consult an attorney in your jurisdiction if you plan to ever have or carry a weapon of any kind for self-defense.

Get training on any weapon you may own. Practice with it safely and regularly.

Pointing a gun at a human being is considered deadly force in all jurisdictions I know of. Don't point a gun at a person unless you are legally and morally able to do so. Never threaten anyone with a gun unless you are willing to shoot immediately.