I prefer flip down rear and pinned front with ACOG.
As rugged and tough as the ACOG is, there's very little chance you'll ever need the BUIS, but it's still nice to know they're there.
History fails to record a single precedent in which nations subject to moral decay have not passed into political and economic decline. There has been either a spiritual awakening to overcome the moral lapse, or a progressive deterioration leading to ultimate national disaster.
If you think a strong military is expensive, think about what a weak one would cost