I get the love for ARs (I've got some) but for strictly "home defense" indoor ranges, I'll stick with a 18-20" barreled shotguns. For protecting a larger property where outdoor ranges come into play, then an AR makes more sense. Just my opinion.
Pistol cartridge carbines generally provide pistol cartridge ballistics, but shooter has an easier time shooting accurately............which is a big deal, and justification for the platform IMO.
I've looked hard at tactical shotguns, too, but can't warm up to them, either. Even a quality unit, like a Benelli M4, will be longer and clumsier than an AR, and hold fewer shots. The M4 is pretty spendy, too.
If the bullpups like the Kel-tec KSG were known to be reliable, they might be an option, but so far I'm not willing to shell out the cash to be the guinea pig.
