I read thousands of posts of people looking for the famed "SHTF" gun, but in most cases I get the feeling these people use "SHTF" and self defense/home defense interchangeably. They say they want a SHTF gun, but then they describe their purpose and it looks to me like they actually want a home defense gun. The following are my definitions that I have acquired over my years of shooting and being in LE. To me- SHTF means total anarchy. Full blown Zombie alert and the "Y" virus has taken over. Martial law has been instated and the criminal element has over taken law enforcement. You now have to worry about being robbed anywhere you go and there is a good chance you are at war and must defend yourself/family around every corner. This is when you grab your SHTF weapon, the military carry an M4, cops carry AR's and me I'll probably grab my AR. Home defense means just that. You are at home and some POS gets inside and you need to defend your family. This is not like SHTF where you can prepare to a certain point. You can't load extra mags, turn on a red dot sight, etc. This is grab and go, right now. Most people have a "night stand gun" for this. Me I have my 590 with a surefire forend loaded with 00. Self defense is slightly different. This is when you go out in your everyday life and need to have something to protect yourself/family with if you are confronted with a threat. Most of the time this is a handgun concealed carry. This is a dark alley walking to your car and some dirtbag decides he wants your wallet and is going to hurt you to get it. Cops carry sidearms, me I carry an XD40 SC, a G22 or my new 1911 dependent on the situation. What do these terms mean to you? Are they really interchangeable? To me you can own a multipurpose gun for all the situations above, but all the situations above are not the same. In the grand scheme of things does it really matter? No. Does someone who wants a SHTF but needs a home defense going to get any different advice? No, but I just want to know what you guys think.