Armed militancy is an important part of radical leftism. But getting a gun is actually a pretty small part of self defense on an individual level. Like any weapon, it can actually make you worse off if you don't know how to use it, and a gun especially is only really applicable in very specific scenarios where things have already escalated to a certain point. Generally, your body is your best weapon, and good self defense training will make you less likely to be in those situations to begin with