The Marine Gun Control Unit is the most advanced, processor controlled system available for the militarys gun and cannon platforms. The Gun Control Unit is a simple, yet highly robust system. The GCU controls all of the weapons functions. When either of the twin triggers is depressed the GCU performs the following actions: Power is delivered to the Gun Drive Motor. Power is delivered to the clutch, which in turn engages the Feeder/Delinker system. Marine Gun Control Unit is very effective and useful.