It is the "21 Foot Rule" and an updated research article on it is Link Removed The actual distance could be shorter or longer, and being within that distance with a knife does not automatically justify deadly force.
I have a CO2 BB pistol we took out behind the garage to punch holes in paper and tear up some Coke cans. Believe me, he's capable of both.
I think he'll be getting a pump BB rifle soon, and he'll have to try out my Marlin .22.
Pistols, that is.
Right now my wife and I each have a medium to compact gun for carry (Cougar .40 and Taurus Millenioum 9mm) and each have a pocket pistol for backup (Ruger LCP .380 and Seecamp .32). Add in a Beretta Neos .22 for practice. She thinks we have enough, I think we have a good...