Really, this puts the lie to the case the gun nuts make for their paranoid delusion that the only thing keeping them safe is that gun under their pillow. If that were true at all, blind people would be extinct. (sure the blind are victims more than the sighted, so don't write me) The fact is that competent, sane people should keep a defensive weapon in the house with a trigger lock. If unlocking it is going to take too long, you should spend your money on better locks and plant some thorn bushes under your windows.
A short barrel 12 gauge pump is your best choice, but even that requires a lot of practice. Join a skeet club if you don't go to Camp David on weekends. A handgun is really way beyond the skill level of most people. Do you own one, have you fired 10,000 rounds for practice? For most people it's just a much needed penis extender. The assault rifle isn't any better for somebody with no real training, but a load of bird shot will take down any