If you can’t understand any potential military applicable advantage of firing nearly twice the bullet mass with considerably higher sectional density (.25 vs .18) and twice the ballistic coefficient, which reaches 600 yards with 400fps greater velocity and 3 times the energy than M855, I don’t expect we can have a fruitful discussion.

What we do know - the DoD asked for this type of performance and such was delivered. So someone with a much more important opinion on the matter than you or I sees value in it. Barrett has begun delivering 18” Rec7’s with Proof Research match grade barrels to the DoD, so I think it’s reasonable to speculate your average infantryman isn’t going to be handling them - it’s obvious this isn’t a replacement for the M4.