M4 Clone upper for sale, asking $650

Parts:
 - KAC M4 RAS Rail Deployment Kit (VERO BEACH Markings) - Comes with KAC Rail used in Afghanistan, and deployment kit with Rail Panels and VFG, all Vero Beach Production
 - FN CHF 16" barrel, 1-7 twist rate and 5.56mm chamber and FSP gas block
 - Aero Precision Upper Receiver (Assembled with Colt parts kit, and using Colt Barrel Nut and D-Ring
 - MATech flip-up rear sight (200-600m)