When was the last time that guns protected someone in the US from an ICE raid? Basically never. Now imagine ICE five years in the future as a much more ingrained police state when they actively start hunting citizens.
It bought quite a few people some extra hours or days during the Warsaw Ghetto Uprising. And a couple women their lives, since one of the officers that saw them fight decided a few of the Jews were people with courage rather than just more trash for the incinerators and actually went out their way to send a couple of the brave fighters to the work camps instead of the gas chambers. (See woman on right here[], for example)