I found a training presentation from the Los Angeles police department that has some examples of what people will do when called to dive deep into their resource pool for "protection".
Keep in mind that many of the comments are from the cynical view of a police training situation and they are trained from the start t separate the population into two different groups "police and criminals". If you are not one you are the other.
Anyway, in their explanations of what to look for they also render some instructions on "what will work" in an emergency.
You can look at it as what you should watch our for in the hands of others or what you can put into your own hands for emergency use.
https://info.publicintelligence.net/LA-D...eapons.pdf
BTW Los Angeles has an area of 500sq/mi and a population of 4 million. Their sheriff's department has a staff of 10,000 officers.
And most of these are illegal in the present normal social condition. I am not advocating breaking any laws, only giving information for the time when laws might have been rendered moot.