Features:No modifications needed to installDecide in a second whether you want to play in DMR, CQB or any other setting you like.Choose between the Closed Bolt Mode and Open Bolt Mode.Tested in water and had no effectsAvoid dry fire with magazine counter.Set the selector switch to single and/or full auto mode.Know in advance what your ROF (Rate Of Fire) will be.Lock the writing of each parameter thanks to the Tournament Lock to participate in events with the most demanding event organizers.Use the better known DualTrigger mode like BinaryTrigger to be faster than your opponent.Play with paintball features like RAMP.Reverse the Semi and Full Auto selector using the “Reverse Fire Mode”.Product Description: “The Gorilla FCU is a control unit designed for any HPA system that responds to the needs of those who are tired of having to extract the traditional FCU every time to make very long settings and endless tests, but above all to facilitate all those complex settings.It allows you to replace the FCUs of all the most popular hpa systems on the market, whether they are single solenoid or the more complex double solenoid without removing functions but even adding new ones!It is possible to control the fire mode to SEMI or AUTO mode with each HPA system.It is also tested to work on rainy days without problems, avoiding damage.The FCU connector allows you to connect it directly, without any modification, to all Polarstar products as well as Redline N7 and SR-E.In the end we have a software limit switch to avoid dry fire, tournament blocking because Gorilla Airsoft DOES NOT SUPPORT CHEATERS, separate and totally permanent permanence values customizable for the position of the SEMI and AUTO focus selector.