I'm a conservative and gun advocate, but I still can't buy the rationale for owning an assault rifle on the outside chance that I live though a complete breakdown of society. Best thing for home defense is a combination of a sign in front of your house stating that you have an alarm system along with a dog that has a loud bark. Burglars will just go to the next house. Best home defense weapon is a sawed-off shotgun. I can take out a whole room in 5 seconds or less.