Yeah Bax, you still haven't explain why you need a semi-automatic to take out someone who's broken into your home. What if your kid wanders out to see what's going on and gets a couple bullets in her head? What about the damage you'd be doing to your own home, and anyone that happened to be passing by in the street, should the spray break through a window or something?
You're making an argument for why you should have a gun. I've already said that as long as it's purchased legally and you keep it safe and have proper training on it that I'm not opposed to you having a gun. But you shouldn't own a military-grade weapon. There's no need for it and you haven't shown it to be necessary at all.
And speaking of being prepared, what about all that talk about Ockham's Razor? It's the most likely reason someone is breaking into your house robbery? Be prepared if you want, and after all else has failed, security, guard dog, bars, locks, and he STILL gets in, and you can SEE a weapon or he acts in a way that looks threatening to you (and sorting through your silverware drawer is not it) then shoot him. In the leg, or the arm. You don't need to kill someone to protect your home. For all you know the guy is a single father stealing stereos to feed his kids.