i don't run back up iron sights on ARs anymore and haven't for many years. However, I only run either extremely reliable optics (aimpoint, acog) or the rifle is a game gun and doesn't need them.
if for some reason i was using an eotech or some other brands of red dots or optics that are known more for their warranty service than their reliability, i probably would use BUIS.
although it's expensive, a back up optic on a QD lever is probably a better choice than backup irons.
if for some reason i was using an eotech or some other brands of red dots or optics that are known more for their warranty service than their reliability, i probably would use BUIS.
although it's expensive, a back up optic on a QD lever is probably a better choice than backup irons.