Read my post #10.
I agree.
Only a buyer with a contract for 400,000 or a million units could demand those features and leverage the quantity of units to offset the cost/price increase.
But, for future contracts in SMALLER quantities, what shop will set up the lines (dedicated lines, probably) to make a MILSPEC rifle at higher cost?
It'll add a few bucks to the cost, but it'll meet the spec.