This gun has been HPA tapped for its max performance and reliability as apposed to Gas. The gun comes with everything seen in the picture, everything. Upgrades include: -enhanced nozzle -Steel transfer bar -enhanced loading rack -Tokyo Marui barrels polished -smooth underbore for smooth racking -Brass HPA fitting Included in the box: -the gun -side saddle -6 shells -HPA tapped tank -EoTech -magazine extension tube Need this gone, 500+ dollar value here. So your gain is my loss. Price is shipped, price is negotiable Thanks, Have a good day!