Bit of backstory on me. When I was around 21-22 I started carrying a firearm for self defense. However, I also read the 21-foot rule, the idea that if someone suddenly pulls a knife and charges you to stab you, if they're within 7 yards they will likely stab you before you can draw your gun and shoot. I read anecdotes on gun forums talking about how someone had to defend themselves with hand-to-hand combat before being able to draw their gun, and that led me to seek martial arts training.
This was about 5 years ago. I did a search back then for martial arts that would fit what I was looking for: an art to quickly avoid or escape an attack to buy myself the couple of seconds needed to draw my firearm. For example, to block a punch and create space, to avoid being stabbed and gain control of the situation, or to break free from a grab at least enough to draw.
Of course, my search for the "perfect" martial art pretty much failed, as in my area we basically had taekwondo and MMA, with a karate school or two sprinkled in. So I found a school with a great master and started taking Taekwondo.
However, just for the sake of my own curiosity, I thought I'd come back to this idea. If your goal is to defend against an attack long enough to draw a firearm, what art(s) would you recommend?
For example, I think the styles of BJJ and wrestling wouldn't be very good, as the goal of those is to be wrapped up, and they don't create much space. Hapkido, which I am learning at my school (although I'm only an orange belt in HKD and I'm a 2nd degree in TKD) I think would be pretty good, because generally we try to stay standing as we take our attacker to the ground.
I think that any art which uses a combination of punches and grabs in stand-up would also be pretty good. Traditional Taekwondo self defense skills combined with modern Taekwondo sparring tactics could be a good amalgam for quick defense and gaining space. At the time I did my research, I read of a more obscure Chinese art called Baguazhang which was based primarily on footwork, and thought that would be a perfect fit, except there was nowhere anywhere near me that taught it.
I'm not going to try to suppose for arts I don't know as much about. I imagine the styles of some arts would be incongruent with the goal of getting to a firearm, whereas others will work very well. So what do you think? What art would fit the style I was looking for back then?