This A2 upper has less than 50rds down the barrel. It's all Colt. 16" pencil barrel with A2 sights, forward assist, b/ch/bc.. Receiver also has M4 relief cuts. Small pivot hole..
$525 shipped.. MO or paypal accepted.
Would consider trades for a new Oly 10.5" 9mm upper, RRA,DPMS,PWA stripped lower.