USAF_Vet
Member
It has been shown that an agile knife man can cover 20 ft or more before the average CCW person can draw and fire. Whether it is a knife man or gunman there is a technique called getting off the X in which you move out of the line of fire or knife attack.
I've actually trained for this. Had a guy stand about 10 meters away from a group of us who were listening to a tactics lesson. He would randomly charge with a fake knife to see who could draw and "fire" (all weapons were either fake, or zip tied open and cleared) before he got to them. If he tagged you before you could draw and say "bang", odds were he inflicted a serious wound. Most of us were killed or wounded in the scenario, even knowing he would be coming for us. So with even the mental preparation we all had, and even keeping an eye on him during the lecture, we were mostly all taken out.
A couple people were able to get off the "X" but very few were able to "bang" before he was able to correct course and tag us. And that was at 10 meters, visibly brandishing his weapon. If he was at 15 meters, most of us had an chance to draw, fire and evade. Not too many knife attackers are going to make their intentions known at that range.