Unfortunately, I am thinking about swapping to a glock because I only care about home defense, and the bottom falling out on everything. If it does, I only want to have one type of ammunition to be concerned about. Carrying multiple cal doesn't work well for that...

Hell, give me a a damn SD adapter kit for a basic 5.56 lower. I'm sure that we can find an upper AR9 to fit. Or my noob *** could be completely wrong on that part. Wouldn't be a first.