A3 flattop (w/T marks), 16" no ban, Heavy barrel, 1 in 9 twist (M1S, not chrome), 4 rail handguards (Oly Firsh, w/11 rail covers, the entire set is 12), A2 flash hider. Complete with bolt, carrier, charging handle. Approx 450 rounds through it.
$415 shipped (no upcharge for paypal).
I have a couple more pics if you'd like to see them. I tried to get close up of the marks on top of the receiver. There is a small mark on the end of one of the rails and small mark on barrel.
Also have an Accushot T168 scope with Mildot recticle. One trip to the range with this baby, it is in excellent condition. $45 shipped (no upcharge for paypal)
Email any questions. [edited to fix images,add trades]
Trades: A2 upper w/20" Hbar/DCM/CMP barrel