Here are the specs:
16" chrome moly flutted 9mm barrel with threaded comp from Ameetec
RRA flat top upper
Olympic Arms free float hand guard
YHM flip up front sight
Comes with charging handle.
All the parts were brand new when I put it together. It has less than 500 rounds through it and shoots great. I have no use for this upper since I got a LRM M169 suppressed upper and a SBR upper.
$675 delivered (FIRM), +3% with paypal.
$500 w/o bolt and c/h.
No trades. E-mail me for more pictures or questions.