GC_UPC Aero Precision Complete Upper Receiver, M4E1 Threaded PRO, 5.56, 16.3in Barrel, Gov Profile, Mid-Length Gas System, 1-7 Twist, 1/2 x 28 Thread, ATLAS R-ONE Handguard, VG6 Delta Flash Hider, Anodized, Black, APUG700705M105-1 $776.99 APUG700705M1051 show more like this Dvor GC_UPC Aero Precision Complete Upper Receiver, M4E1 Threaded PRO, 5.56, 16.3in Barrel, Gov Profile, Mid-Length Gas System, 1-7 Twist, 1/2 x 28 Thread, ATLAS R-ONE Handguard, VG6 Delta Flash Hider, Anodized, Black, APUG700705M105-1 $776.99 APUG700705M1051 show more like this Free Shipping on most orders over $49 Optics Planet GC_UPC Aero Precision M4E1 Threaded PRO 16.3" CHF 5.56 M-LOK Midlength Complete Upper $1,029.99 APUG700705M105-1 show more like this $8.99 Flat Rate Dirty Bird Industries