I have an upper receiver that has around 100 rounds on it. It is a very accurate upper and shoots sub moa with several rounds. It likes the PMC XTac 55, IMI 77Gr Razor Core, and it loves the Federal GMM 69gr and it shoots closer to 1/2 moa with those. Build parts are listed below. Everything is in like new condition.
Asking $700 shipped
Aero Precision FDE upper receiver with the Magpul dust cover
Midwest Industries FDE Combat rail
Criterion Core 13.9" 223 Wylde barrel with the BCM head spaced bolt from Criterion
Superlative Arms adjustable gas block
Superlative Arms bolt carrier
Geissele Airborne charging handle
Asking $700 shipped
Aero Precision FDE upper receiver with the Magpul dust cover
Midwest Industries FDE Combat rail
Criterion Core 13.9" 223 Wylde barrel with the BCM head spaced bolt from Criterion
Superlative Arms adjustable gas block
Superlative Arms bolt carrier
Geissele Airborne charging handle