"who in the world needs an assault rifle?"
People interested in self defense. The term "assault rifle" or "assault weapon" was made up by the media. An assault rifle is just your typical rifle that your great grandfather would have used for hunting back in the day. It is not what the media and politicians will lead you to believe.
I think what leads people to ask this question is an major misunderstanding that an "assault rifle" is a big scary machine gun. They are not. An AR15 or AK47 are not machine guns that spray bullets with a single trigger pull. (Those are fully automatic weapons that are already heavily restricted). Assault weapons account for, on average, 2% of all firearms used in crimes, with the highest estimate being 13%. [1]
The semi-automatic AR15 or AK47 are actually very effective and safe home defense firearms for a few reasons:
- The round they use is less likely to penetrate through walls compared to a standard handgun round. This has been ballistically tested numerous times but no one likes to mention it when talking about the issue.
- They are easier to shoot more accurately at close range and longer distances.
- They hold more rounds. Why do you need more rounds? Because one shot is unlikely to stop most threats. Shocking I know, this is also something that is not how it seems in the movies. Also unmentioned when talking about self defense is that there may be multiple attackers. It's not so uncommon to have more than one attacker in a home invasion.