I've kept my AR handy for home defense for years, and I have to disagree with the "fact" that it's not a good home defense gun. Any gun has a potential penetration problem in a truly dense urban setting, but not everyone lives in such a setting. I live in a valley where all my neighbors are a few hundred feet from my house, and significantly higher in elevation. There are no houses up and down the valley, and I feel my choice of the AR is a sound one. I found the links to penetration tests in this thread interesting too, since I had heard from several sources that penetration of the .223 wasn't the problem that some feel that it is, nice to see some facts to back that up.
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