Hey I built this gun using the Wolverine airsoft Reaper and co2 stock Wraith. The gun has always given me trouble but if you know hpa you could easily get this perfectly working. The Reaper is electromechanical. I have put more than 900$ in the gun. It has a r-hoped ZCI 509 barrel with a g&g green bucking in a prowin hop up chamber. The stock around the wraith is a magpul stock. It comes with a scope and a tuneable trigger to adjust the trigger pull to your desire. I’m not willing to trade at all. Needs tuning. Not selling separately. Shipping will be discussed.