Deuce_454 made a very valid point one that I agree 100% with. An AR is not the kind of weapon you need to defend your home. It comes down to having the right tool for the job kind of thing. Penetrating a wall is going to happen with just about any firearm and bullet. I can't stress enough the "Know your Background" rule. I'm sure you've all heard of it one way or another. It's also a good idea to have a plan of what you are going to do if you do have a home invasion. Keep in mind this could happen while your asleep...at that point the intruder has a huge advantage! Have a plan and practice it.
One other point that I hope you all will put into action.....Keep up on your training. Defensive shooting and Defensive tactics are a perishable set of skills. I don't know of one Law Enforcement agency that doesn't require recurrent training. Again...there's a reason for that.
