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How old are you? I'm seriously concerned about your onset of alzheimer's.
I also have HBAR's and CAR-15 versions of the civilian AR series and they "do" drive tacks but not as well as the heavy barreled bolt varmit rifles I have in the same caliber.
My mini came back wearing a 11 degree crown on a new bull barrel. I have tried every accuracy trick and mod I know of , from free floating the barrel to even changing the barrel yet for reasons unknown to me and my gunsmith in Conroe, the mini just won't group "as well" as an AR will.
Bottom line is both are reliable and will hit the 18 inch brisket/torso in self defense mode ranges. My cheap (if stolen) always outta the safe CQB rifle is a AK-47 with an Aimpoint 5000M on it and a mag cinch setup for 2 each 30 round magazines.
I choose this as badguys wear kevlar too and 7.62 x 39 is primo stopper. After thousands of rounds of range use I determined it was 100% reliable for my house needs and 200 meters out , to backup my four Rottweilers if they "need" me :o). Anything further out than that I go to cover and wait for LEO's or a closer shot.
Stay Safe and just understand some folks have a choice and some people don't. The mini or AR will do in a pinnch but AR, IMHO, will do "it" much , much better.
The scariest man around is the old cracker with the beat up 1960 Savage 30-06 with the cheap Bushnell 3X9 on top who fires only a few times a year and brings a deer home every time. You do not want to be that guy's enemy, I promise you.