“but BUIS on my red-dotted ARs is a must”
I completely agree with you there. What if your batteries fail, and you can’t replace them? What if a (ok, REALLY a stretch here), EMP occurred?
I think you should have iron sights before anything, and learn to shoot with them.
I love my Troy Battle Sights.
ESPECIALLY if you spend less coin on a cheaper sight. I’ve used them casually and the mount or the electronics are FAR more prone to failure. MILSPEC does mean something.
You mean you don't have pop-up illumination flares in the cleaning kit well in your ARs buttstock for just such an occurrence? That's why I don't recommend 'CAR' stocks to people: No cleaning kit well for your pop-up flares, waterproof matches, emergency bandages, gold coins, and presumably, some weed.
:-}
Also, the Tritium in your ACOG would work even better now that all the lights across the landscape have gone out. No background clutter or light pollution at all.
... and Mr. SJSAMPLE, you're merely inventing a purpose for your backup irons. Use the edge of the your top rail as an emergency sight in case a zombie knocks off your optic with a lucky swing.