New first quality Aero XL assembled upper and Aero (Ballistics Advantage) barrel.
1) NIB 1st quality Aero Precision assembled upper receiver with dust cover and forward assist.
2) Aero (Ballistic Advantage) 16" lightweight modern series barrel; 5.56mm. Mid-gas, .625 block, M4 ramps, 4150, 1/7, threaded, QPQ finish (nitrided).
Both are new, not blem. Barrel has been proof tested/fired by BA. I have cleaned and inspected it to make sure it has no detectable flaws and it is ready to be broken-in. I also have a non-fa upper (has port door and deflector; not slick-side) if you prefer that (also new in box, 1st quality).
$220 shipped.