The ASCU II is a two piece electronic module (Control Unit and Sensor Unit), that makes every standard AEG with Marui type Ver. 2 gearbox, work exactly as the most expensive and sophisticated airsoft rifles known as Professional Training Weapons.
It has a pre-programmed 3-round burst, if the trigger is released before the third shoot in Full-Auto mode, if the trigger remains pressed the AEG will continue to fire until trigger is released.
The ASCU II system monitors the operation of the AEG in any time, and no matter how fast you tap the trigger, the AEG will always complete the full cycle, no matter if you shoot in Semi or Full Auto mode. After each shot or burst the piston will stop in its foremost position.
It features an integrated Low Drain Protection, specially designed to keep LiPo batteries from damage.
The ASCU II will also stop the AEG firing if any mechanical problem occurs in the AEG, which protects the internals of the gearbox from further damage.
The unit is easy to install in all AEG's with Ver. 2 gearbox. In most of the models there is no need for any modifications of the original parts of the airsoft rifle, nevertheless some models may need some minor and easy to do, modifications of some parts in order to make the installation easier.
  
Benefits:

• Always completes full cycle of the gearbox.
• No gearbox jams.
• Crisp and realistic trigger feel.
• Reduced realistic trigger travel.
• Faster trigger response.
• Increased rate of fire.
• Increased battery life.
• Increased main spring life.
• 3-round burst option.
• Compatible with all kind of batteries, gears and springs.
• Battery deep drain protection integrated.
• Safe for LiPo batteries with automatic power cutoff.

   
Important: The ASCU II works properly only with motors with strong magnets, With cheap and weak magnet motors the active brake will not be effective. We recommend using ULTIMATE motors, the most sophisticated motor in the industry.

We strongly recommend that the ASCU should be installed by an experienced airsoft service.

Can be used on all version 2 gearboxes by all manufacturers except ICS.
For the following type of airsoft electric rifles: