Wolverine Inferno HPA Engine Gen 2 for AEG v2 - Premium ElectronicsThe INFERNO Gen 2 features a revolutionary single solenoid, independent poppet and nozzle design that sets a new standard for a drop in kit. Particularly, it is designed to solve the open bolt problem. It is a hybrid design which keeps the advantages of an open bolt system: easy tuning, no first round dry fire, efficiency, etc and adds the simplicity of easier hop up tuning that closed bolt systems have traditionally offered. In addition, it further