Glock9mmOldStyle
Campaign Veteran
Uhmmm ...???
May want to re-phase to: have a plan to defend against everyone you see...just saying, why give the anti's any more crap to throw at the fan?
No such law, but I believe the 21ft thing comes from variations of the Tueller Drill. The idea is that you can probably be attacked by a person with a non-projectile weapon in less time than you can draw if the attacker begins his attack at a distance of 21ft or less.
At my CPL class, reaction time vs distance covered by the attacker was demonstrated in a live-fire situation. You have a person (attacker) touch your back while you are facing down range with your gun holstered. As soon as he releases his touch on your back, you go for your gun and fire down range. Meanwhile the attacker is fleeing away from you as fast as possible. As soon as the first shots are fired, the attacker stops and drops. Then measure the distance. It's usually more than you would expect. You can do this the proper way with paint guns or airsoft (and proper safety gear). There are plenty of videos on youtube.
All the more reason to have a plan to kill everyone you see.
May want to re-phase to: have a plan to defend against everyone you see...just saying, why give the anti's any more crap to throw at the fan?