For sale Black rain ordinance barrel on an Aero Precision Upper

I am selling an upper that I put together. The upper was put together and test fired with around 100 rounds of factory ammo. Shoots great and is very accurate <1 MOA at 100 yards.
I am selling to make room for another project I want to put together.

It consists of
1) Black Rain Ordinance 20 inch 223/556 barrel (I believe it is a 223 Wylde chamber but there is no markings on it) 1:7 inch twist
2) Surefire ProComp flash hider/muzzle brace
3) SLR rifle works adjustable gas block (mounted...