A 10.5" AR pistol with a brace, red dot, and quality ammo is in the top 10 home defense/CQB weapons of all time. There's a reason pretty much every force in the world that does room clearing does it with an intermediate cartridge SBR. Contollability, speed, effectiveness in people, limited over penetration, it hits all the spots. M193 is coming out of a 10.5 inch AR at about 2800FPS, and will fragment in people or walls out to a reliable 50-60 yds.
If you like Vodka, a Krink with the triangle brace is pretty solid too.
Yes, the NFA is a stupid law, but It's what we have right now, and the braced pistols are a great way to have an SBR without having an SBR.
FWIW, when I did the safety test to join my new range, of the 15 people there, mine was the only "rifle" AR.