F Aero Precision M4E1 Mid Barrel Complete Upper Receiver w/Flash Hider, AR-15, 5.56x45mm NATO, 16in Mid Length Barrel, 12in M-LOK Handguard, No BCG/CH, Anodized, Black, APAR640231M7 $579.99 APAR640231M7 show more like this Dvor