As for the "recoil of an AR-15"... total hogwash. While it's loud (high velocity round = loud noise.. DUH!), it's got little more recoil than a .22 varmit rifle.
You're an expert on home invasions now? Why don't you talk to people who have actually had their home broken into and see what they think? I have.
No, it did not happen to me. When I said "I have" it was to mean "I have spoken to people who have had their home's invaded/broken into." I pray it never happens to me or my family. Because if I have to shoot someone, I'm going to have to live with that. But make no mistake, I'll do it to protect my wife and little boy.
As someone who actually has been burglarized, this is the gist of it: Thieves wait until no one is home. Thieves break in stealing stuff.