Yeah a friend of mine has a few suppressed blackout ARs. I've debated buying a Blackout upper, but since I don't shoot suppressed and don't reload it's one that I've decided against for now. Decided it made more sense for me to buy a x39 upper and work through the magazine issues they sometimes have to get an AR in .30 cal since, without reloading, the ammo is far cheaper and I'm just changing complete uppers rather than the pain that is an AR barrel change so having to have a special bolt for 7.62x39 isn't a huge deal, and the advantages Blackout has in shooting suppressed don't matter for me since I'm not looking to buy a suppressor. To your earlier point, my ARs are mostly range toys. If I'm in a home defense situation I'm going to be using a full-size pistol (XDM 9 in my case) anyways because of over penetration concerns - unless an army tries to break into my house the advantages of using an AR don't outweigh the over penetration concerns for me.