The 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 that 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 improves the efficiency of our previous systems by an estimated 10-15%.