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ASTER SE EXPERT for V2 GB + Quantum Trigger

ASTER SE EXPERT for V2 GB + Quantum Trigger

Not possible to choose the color or style of your free QUANTUM Trigger

Regular price USD 72.90
Regular price USD 91.60 Sale price USD 72.90
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Regional Lock

Color may vary slightly depending on batch

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  • ASTER SE raises the price-performance ratio by including a Quantum Trigger in the set and new functions programmable via trigger. Now, out-of-the-box, you can set sensitivity from ludicrous touch through hair to full movement. Improved programming via trigger gives you new settings such as automatic Pre-Cocking (LOW, MID, HIGH), trigger sensitivity adjustment, Active Brake settings with top-class adaptive mode and the new SAFE-SEMI-BINARY selector mode. Calibration, DTC codes – all available just via trigger and selector movement. Additionally, you get the new noise-resistant trigger detection algorithm. ASTER SE's smart fuse protects your AEG’s battery, motor, and the controller, even in the case of reverse battery connection. This feature, along with the optical sensors, makes ASTER SE one of the most durable ETUs on the market. ASTER SE is not just a regular ETU/EFCS mosfet. It is a complex system that turns your AEG into future-proof advanced training equipment.

  • ASTER SE is future-proof, thanks to compatibility with USB-Link and Blu-Link. You can update your firmware and get new options, connect additional accessories, check telemetry.

    What is an ETU? It is an Electronic Trigger Unit replacing trigger contacts and the cut-off lever, which takes control of your AEG.

    Why is ASTER SE's programming via trigger user-friendly?

    • you do not need to rush
    • you can navigate the menu very quickly and efficiently or slowly and calmly
    • the colors of the led lights are only a help – you can rely on the vibration of the motor
    • in case of any problems, you can use the very popular USB-Link or Blu-Link and use the GCS App

    What is the self-learning automatic pre-cocking?

    • thanks to pre-cocking, you gain trigger reaction similar to real life
    • it will automatically set piston position
    • it is easy-to-use, just set one of the 3 modes: LOW, MID or HIGH
    • it automatically adapts to the battery voltage and rate of fire
    • ASTER SE gives you great flexibility and is future-proof. You can program the most important functions via trigger and using a USB-Link or Blu-Link to configure advanced functions, perform a firmware update, run diagnostics or use the GCS app on a smartwatch
    • Hair-trigger – up to 60 sensitivity settings in the first millimeter of trigger movement
    • Top-notch automatic pre-cocking
    • ASTER SE is resistant to reverse polarity
    • You can update its firmware via the Internet
    • ASTER SE is a part of the GATE Ecosystem
    • Lowest in the market current consumption –deep sleep mode with only 0.29 mA current consumption prevents battery discharge
    • Built-in voltage boost converter allows for trouble-free operation with weaker batteries and increases the switching efficiency
    • 3.75 V ready – it operates at very low voltage (even 1.2 V during the shot), which is important in high-tuned AEGs, where the voltage under load drops significantly
    • Sensor that supports Infinite Torque-up, DSG, SSG, 19-tooth and standard gears
    • The possibility of using a mechanical trigger lock
    • Compatibility with brushless motors
  • Supply Voltage Range

    3.75-12.9 V

    Current Consumption

    23 mA

    Low Power Mode

    288 µA

    Dimensions (Length x Width x Height)

    43.8 mm x 28.7 mm x 7.2 mm

    Finished Product Weight

    22.25 g

    Operating Temperature Range

    min. -15°C max. + 50°C

    Relative Humidity

    ≤ 80%

  • Connect your ASTER SE with the GCS App and get total control of your AEG

    You choose how to configure ASTER SE – simply via trigger or through USB-Link / Blu-Link and our advanced GCS App. Update ASTER SE firmware using Blu-Link or USB-Link, carry out diagnostics or change settings in a very convenient way. You can also use the Smartwatch app, giving you real-time data to reinforce your tactical decisions.

    Control your airsoft replica from your iOS, Android, macOS or Windows device using an additional dongle—USB-Link or BluLink
    Set trigger sensitivity exactly as you like and adjust other ASTER SE settings in a simple way
    Use automatic Pre-Cocking to gain a trigger reaction just like in real life


    ASTER SE and the GCS App give you total control of your AEG

    GCS means:

    • Controlling your airsoft replica from a smartphone with Android, iOS and with Windows or macOS

    • Real-time data from your smartwatch (with Wear OS or watchOS) to reinforce your tactical decisions and get the advantage necessary to win

    • No more surprises with an empty magazine or a discharged battery

    • Easily adjustable ASTER SE settings during the game

    • Instant firmware updates

    • BB counters, electrical measurements, and statistics

    • Diagnostics and send reports

    • Latest news from GATE Enterprise

    • Virtual STATUS for smartwatches and smartphones

    • Use of bolt-catch and magazine sensors for realistic reloading sequence

    Download GCS App 



Enables you to set two different trigger sensitivities. Pulling the trigger slightly produces SEMI or BURST fire. Pulling it further produces BURST or AUTO fire. Select your sensitivity preferences for each stage.


Two selector sensors allow you to take advantage of hundreds of selector mode variations. The following modes are available for selection:

SAFE – prevents your replica from firing, even if the safety lever is removed

SEMI – allows you to fire one shot per one trigger pull

BINARY – allows for firing one shot on the trigger pull and another shot upon release 

BURST – enables you to shoot a predetermined number of BBs, which is very useful in MilSims and when using low-caps; there are 2 BURST Modes available: 

  • Full – a burst is shot in full, even if the trigger is released before the preset number of BBs has been shot
  • Interruptible – the burst can be interrupted by releasing the trigger earlier - when the trigger is released, the shooting stops even if not all the BBs from the burst have been shot

BURST/AUTO – available in Full BURST Mode only; allows for extending a burst by any number of shots – if you hold the trigger after the burst is shot, it switches to AUTO Mode 

AUTO – shots are fired as long as the trigger is pulled

SEMI RAMPING – if you pull the trigger very fast, it switches to AUTO Mode

Please note: In the case of Regional Lock, only SEMI Mode is available. Check law restrictions in your country.


Victory in the game is often a matter of fractions of seconds. Thanks to pre-cocking, you gain trigger reaction similar to a real replica. This allows for initial spring compression, which speeds up trigger response significantly.

There are two Pre-Cocking Modes:

  1. AUTO Mode – the spring is automatically compressed after each shot—you choose the level of pre-cocking from the list (Low/Mid/High)
  2. MANUAL Mode – set the pre-cocking values yourself—instead of percentages there are time settings, you have to choose the time for yourself by trial and error: 1-250 ms

*Now Pre-Cocking is fully operational in SEMI, BURST, and AUTO Modes

Please note: using Pre-Cocking increases wear and tear on the gearbox.


This feature allows for simulating magazines of lower capacity than actually used. Allows you to set a simulation of magazine capacity from 1 BB up to 250 BBs. Even if you have a high-capacity magazine, this function lets you truly increase the realism of your game by imitating a real-cap mag. Then, after a predetermined number of BBs is shot, you will have to wait for a previously defined amount of time before the next shot can be fired as if you were really replacing an empty magazine with a full one. You can also set Low Ammo Warning.


Enables to set a predefined number of BBs fired in a single series from 1-250 BBs. It can be used as protection against trigger jams. In case of emergency, you can stop the series by switching the selector position.


It lets you set the delay between shots or series to simulate the delay from reload or recoil. You can set the delay within the range of 0.01-5 s.


ROF Control enables the reduction of a replica’s rate of fire. You can use stronger batteries and still have the ROF exactly as you like. You can choose between Adaptive, Manual PWM, Manual Delay, and Manual Delay + PWM.

Adaptive – set your desired rate of fire; the brake and delay will be automatically adjusted to achieve this value

Manual PWM – set the motor power throughout the duration of the shot

Manual Delay – set the exact delay between shots in milliseconds

Manual Delay + PWM – set braking power and delay manually


We know how vital fast trigger response during combat is. That's why we've developed the Smart Trigger function, which enables you to achieve faster trigger response. It works with the ROF Control System. During the first shot, the microprocessor sets the ROF control to 100%. After the first shot, it switches to a previously programmed value (e.g. 50%). As a consequence, the first shot is fired at a full ROF and subsequent shots at a reduced ROF. The best results can be achieved when using a battery with above standard voltage. For example, if you’re using a 7.4 V battery, you can replace it with a 11.1 V one. This way, you will achieve faster trigger response with the same rate of fire than with a standard battery. 


Protection against battery over-discharge. Modern LiPo and LiFe batteries are very sensitive to over-discharge. If you do not want to damage the battery and you care about its service life, this protection is indispensable. The microprocessor is constantly monitoring battery voltage. When voltage drops to a critical level, it will not allow firing. The number of battery cells can be detected automatically.

When battery voltage drops to a predefined level, the motor will vibrate at regular intervals. The user is warned 5 times before the battery is discharged. Each warning is communicated by 3 vibrations: HIGH → MID → HIGH. 

You can set the battery type: LiPo or LiFe as well as the number of cells or choose Manual and the Low Battery Warning and Battery Cutoff values.


Do you care about realism? Would you like to increase the life of the gearbox? Does your rifle have such a high rate of fire that you are not able to make a single shot? The Active Brake sorts things out. In SEMI Mode, the brake does not allow for compressing a piston after a shot. The piston will stop in the front position which eliminates unnecessary stresses, increasing the service life of the gearbox and its parts. This is important, especially with an AEG power upgrade. After releasing the trigger, the rifle immediately stops firing. So, you gain more realism and, additionally, you do not waste your precious ammunition.

Choose Adaptive or set it manually between 0-100%.

Decide if you want to use the Active Brake function. If you do not need this, you can turn it off easily. It will lead to improving the lifespan of your motor. Adaptive Active Brake automatically adjusts the motor's braking power according to your needs.


You don't need to fully release the trigger to fire the next shot. This option is really useful when the trigger sensitivity level is very high.

  • Off – to fire the next shot, you need to release the trigger until it reaches the selected trigger sensitivity level
  • 2 Level – to fire the next shot, just release the trigger so it changes the position by ~40% of trigger movement
  • 1 Level – to fire the next shot, just release the trigger so it changes the position by ~20% of trigger movement.
  • Manual – you can adjust the percentage of trigger movement exactly as you want


Thanks to the gear cam sensor, drop-in unit precisely detects in which position the cycle should finish. The sensor detects the gear cam instead of teeth, so it is possible to use all types of gears: Infinite Torque-up, DSG, SSG, 19-tooth and standard. 


This feature allows you to troubleshoot your AEG in case of any issue. Errors are communicated once they occur, and their description can be found in the GCS App.


Browse and switch between 3 different profiles tailored to different preferences during the game


Do you want to achieve a higher ROF and faster trigger response? Are you planning a power upgrade of your gun? In this case, you need a MOSFET.

It targets the energy from the battery directly to the motor, bypassing the mechanical trigger contacts. As a result, you gain a higher ROF of the gun and faster trigger response.


This allows you to quickly check whether the drop-in module is working properly. It helps to locate where the problem lies when anything goes wrong.


Thanks to its special conformal coating, our product is resistant to atmospheric conditions (Military Specification MIL-V-173C).


You can enable or disable information and warning vibrations, and make your replica stealth.


GCS allows for making firmware updates via the internet, which enables you to quickly apply changes, improvements, and bug fixes. 

    • Everything you need out-of-the-box
    • CNC-machined Quantum Trigger included in the kit
    • No need to use USB-Link for installation and configuration
    • New noise-resistant trigger detection algorithm
    • Hair-trigger out-of-the box. Even 60 trigger sensitivities for the first millimeter (0.04 in) of movement
    • Additional protection against interferences thanks to multi-layer PCB with EMC shield
    • Automatic Pre-Cocking: LOW / MID / HIGH
    • Trigger sensitivity adjustment without any limitation
    • Improved cycle detection
    • Active brake adjustment: Adaptive / Manual 0-100%
    • New selector mode: SAFE - SEMI - BINARY instead of SAFE - BINARY - AUTO
    • GCS App allows for making firmware updates via the internet, which enables quick applying of improvements


Browse Manuals, FAQs, and get instant help with technical issues, warranty claims, and order enquiries.


    Transform your AEG into a computerized training system and gain a unique tactical advantage thanks to extremely fast trigger response—just like in real life.


    The younger brother of the well-known TITAN. Designed to achieve maximum reliability at an attractive price and destined for most AEGs. ASTER is destined for most builds.


    Get data in real-time directly from the STATUS screen to reinforce your tactical decisions. No more surprises with an empty magazine or a discharged battery.


    GATE Control Station is a free universal app for configuring, controlling, and connecting the GATE Ecosystem elements such as the TITAN, ASTER, and STATUS.


    Virtual STATUS functions in your smartphone. No more surprises with an empty magazine or battery.


    GCS App provides essential STATUS functionalities such as the BB counter, magazine counter, and the remaining shots on the battery.


    Blu-Link allows for wireless management of your GATE ETU via the GCS App. You can use an iPhone, Android smartphone or a computer to control your replica with Bluetooth® 5.0.


    The USB-Link dongle is used for connecting GATE ETUs with PC, Mac, and Android devices. Working in tandem with the GCS App gives you full access to functions and settings.

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