I'm not a handgun enthusiast and my shotgun and a couple of rifles were stolen during a burglary years ago. My instructor and a couple of training partners carry. Here in Arizona anyone can carry concealed or openly without a permit, so it's common. The biggest impact on my 'chun is that I have to remember to ask if my buddies are carrying before we train. On several ocassions I've accidentally hit someone's handgun during practice. (We often have informal practices at parks, garages, and the like). Nothing like throwing a low level palm at someone's side and smacking something angular, metallic and hard, only to have your partner say, "Sorry dude, that's my piece!"
Damn! I bet its fun training with you guys. I've heard Texas was about the same as far as everybody carrying.
I remember a few years ago when I had my own Kempo dojo here in Kentucky. I never considered carrying a firearm for self defense but did carry a knife at times. I got licensed just as an example to any of my adult students who were considering getting the permit and/or carrying. I didn't initially carry but I wanted to set the example of exercising my right TO carry.
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The actual day of the 911 attacks I went and bought my first firearm.
The best advice to get with regarding firearms(especially for novices) is to first go ahead and take a conceal/carry class. You learn all the things you really need to know regarding your states particular laws and such. If the instructor is worth a damn at all then you will learn how to clean, disassemble, load fire, reload and all that with your weapon, state-to-state reciprocity laws and such.
Anyone who doesn't want to carry a firearm but still wants some type of protection or fighting chance then there are all types of knives, tazers, batons and spikes, but be careful. In KY any blade over 3" long is considered a deadly weapon. I'm sure other states have some type of limit as well. If you are not licensed and you have a knife then you are outside of the law.
Any of these fantasy 'gun defense' techniques (and I know that my particular art of kempo boasts a lot of these

) where you think you can take the gun away and use it on them is a bad idea. They don't work on the street like they do in the dojo. Three years bouncing at a local venue here in DERBY CITY taught me a lot about that. Also they may have brought the gun into the mix but if you take the gun then shoot them while they are unarmed then you are outside of the law. Those are some things to consider.
The wonderful thing is that in KY the permit covers 'any legally obtainable weapon'. So since you have to pass the shooting test to get the permit I say go and rent or borrow a gun, pass the test, then carry what you are comfortable with. Lastly, just like any other martial art, practice it and you will improve. Gun Range=Dojo=Kwoon