I've never owned an AR before, but I think the blackout is perfect for me. I want a low recoil round that packs a punch out to 200 yards. I'll be outfitting the rifle with a 3-9x40 scope and I doubt anything else except for maybe a light or laser down the road. I don't own a rifle large enough to hunt white tailed deer with now, so this will be my primary hunting rifle but serve dually as an SD weapon. What companies make complete 300aac rifles? I would opt for a longer barrel if I thought it would make a much of a difference in velocity with this round. But I've read this round does well with SBRs, so then, is there much of an advantage whatsoever in going with an 18" or 20" barrel? Where to buy?