I do not favor a AR for home defense, or even a 9mm handgun. Besides the training and practice requirement with either, way too much penetration for either. My preference is a 12ga shotgun. I have two that I'm in the process of deciding which to keep as a house gun, and which will go in my vehicle. Mossberg pump or nice J.C. Higgins bolt gun with tube magazine (made by Winchester). I don't need any accessories, just the gun and ammunition, #4 buckshot by preference. One very important thing, if you do have to use it, make certain first who you shoot at, don't want to shoot a family member getting a snack, or a drunk neighbor who got in the wrong house. It's happened. And, if an actual intruder, depending on where you live, if you kill him/her it could be considered murder if they are unarmed.
"It ain't what you're told, it's what you know." - Granny Weatherwax
Gather the villagers, pitchforks, torches; we march at dusk!
Some days, the supply of available curse words is insufficient to meet my demands.
.....Call me a craftsman, artisan, or artistic, and I will accept that. Call me an artist and you will likely get a quite rude comment in return. I am not a @#$%ing artist.