OP..

I've read the thread, your concerns, and objectives. I'd like to hear a specific purpose or need that you want to have the pistol fill... from what I can gather it sounds like you're looking for back up or primary home defense.

I would do a 9mm build prepped for suppressed. I have all kinds of AR pistols, 5.556, 300 blkout, 9mm... When I look at what I have... If I need the firepower... I'm grabbing my std AR, if I'm looking at anything short of that I'm grabbing my AR9... I run a gemtec on mine and it's awesome!!!!