Simple Krav Maga, Ask Doer. You think I am the only one? Victor Marx is probably the fastest person I have ever seen. He can take the gun away from you in less time than your brain can even react to the initial movement. Something like 1/100th of a second.
I can take guns away. It might take bit of rusing, or hiding to get close. You act really scared, stumble forward and low but still on your feet.
Then <gulp> stand up like this. Check once to see that he has not taken the trigger tension again, that your rused him off of by showing abject fear and no threat.
This close, that is my gun now. My hands are blurring fast. No brag. I can show you how I can grab your eyelid.
Right hand hits the wrist inside, the barrel is off line instantly, because at the same time my left hand pops the gun the other way, and grabs it by the top, while I lower mass for power, and move left. All in one move. It spins the gun into my hand pointed at you.
POW. And you are now looking down the hole and being terrorized by my vicious look, and maybe slapped with iron across the chin. We practice this a lot. The advanced guys sometimes will have training, rubber guns on them.
Suddenly they pull that on us, advanced wannabes, and we gulp into the ruse.
Since it starts by faking fear, we just go with that.
And now, I am working on long arms. Much easier to get inside, much harder to take.
I saw a guy with no obvious training, take a shotgun from a punk, this way
There are a lot of disarms for handgun. Many more for knife.