"Computerized Firing Controller" is probably the best way we could describe the "ASCU" - an advanced, direct drop-in, two-piece electronic module that replace the entire firing system of traditional Version-2 AEG gearboxes.  The ASCU's advance software monitors various key components in the gearbox and issue precise commands to the motor, archiving the most rapid and consistent trigger response, active motor braking, and reliable 3-round burst feature - just to name a few.  It is one beautiful piece of hardware that excels in many areas where competitors have tried and been found wanting.