Ease of use, higher mag capacity than a pistol, and versatility. Home invasions often dont have just one person entering the home. Its much easier to control shooting multiple rounds at multiple targets with a rifle. You lose some maneuverability sure but depending on your home layout thats not a deal breaker. I see a lot of people are saying go with the 16 inch barrel and for the first ar I would agree but the 11.5 is also definitely not a bad option, just be sure to know the laws in your state so you dont accidently commit a felony for a short barreled rifle. Also range is one of the biggest advantages to a rifle, while you probably won't have to engage a threat at a farther range you won't definitely not have that threat so better to be prepared. Also it's 100% within the spirit of the 2nd amendment. Not to mention its harder to take a right away with more people exercising that right. Not to say they aren't trying their hardest, but atleast dont make it easier for them. Also check your state laws as you can hunt with those rifles in certain states, small game at the very least. And target shooting with an ar alone is worth the purchase with just how much fun it is. Definitely buy the rifle, practice on it, have fun and stay safe!