I would like to interject a word to the wise about the use of self-defense weapons.
First, let me say that I am not at all opposed to someone carrying and using one or more weapons to defend themselves or others. On the contrary, I am all for it. However, you need to do more than just carry the weapon. You need to know how to use it. What I am talking about here is being trained -- not just using the weapon against an imaginary opponent in the mirror. If you are not familiar with how to use your weapon in a self-defense situation, and if you have not practiced using it, your opponent is going to take it away from you and feed it to you. That goes for any type of weapon, regardless of what it is.
That goes double for firearms. How thorough is your training in self-defense or combat handgunning? How well can you function under the pressure of life threatening conditions? Can you even find your gun? Can you clear your holster or pocket without shooting yourself? Can you shoot accurately under pressure, and can you place a shot in a vital area of one or more assailants in quick succession? If you are in a situation where deadly force is warranted, it is not sufficient to just wound the assailant. You are going to have to kill him, and you'd better do it with the first shot. If you are not mentally and emotionally prepared to take another person's life, you should not carry a firearm. Furthermore, you should know that if you are NOT prepared to kill your assailant, he is going to pick up on your lack of confidence. You are not going to bluff him in to thinking that you are going to use the gun when you are not. He WILL attack you, and most likely he will prevail. He will either feed your weapon to you, or will use it on you. In either case, you will be worse off than if you had no gun in the first place.
Martial arts is another area where it is important to be properly trained. Reading martial arts books and watching martial arts movies is all well and good, but that does not teach you martial arts. Improperly delivering a kick, blow, throw, lock, etc, can maim, cripple, or kill an opponent when all you may be wanting to do is stop the attack. This can open you up to major legal problems. You can also hurt yourself if you improperly perform some of these moves.
Give serious thought to your selection of weaponry. Do you really want a weapon that requires you to get up close and personal with your attacker? It is possible that he also carries a weapon, and he may be more skilled with his weapon than you are with yours.
Please be careful in the selection and use of self-defense weaponry. If you are not, you will not be the one that survives.