I have a DD M4 V5 NS upper for sale for. It comes with the BCG/CH. I would guess 700 or so rounds through it. I can add a pair of Troy folding sights for $100. Both sights are in good shape and black in color. The rear is Noveske marked.
$650 for the upper with BCG
$750 for the upper with BCG w/Troy sights
$550 for the upper with NO BCG or sights