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GATE ASTER II BT Expert (Quantum Trigger) (Rear), An AEG's trigger system is generally quite simple - there is a physical trigger, that when pulled moves a sliding contact into position between the main contacts, allowing current to flow to the motor
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GATE ASTER II BT Expert (Quantum Trigger) (Rear), An AEG's trigger system is generally quite simple - there is a physical trigger, that when pulled moves a sliding contact into position between the main contacts, allowing current to flow to the motor GATE ASTER II BT Expert (Quantum Trigger) (Rear), An AEG's trigger system is generally quite simple - there is a physical trigger, that when pulled moves a sliding contact into position between the main contacts, allowing current to flow to the motor GATE ASTER II BT Expert (Quantum Trigger) (Rear), An AEG's trigger system is generally quite simple - there is a physical trigger, that when pulled moves a sliding contact into position between the main contacts, allowing current to flow to the motor GATE ASTER II BT Expert (Quantum Trigger) (Rear), An AEG's trigger system is generally quite simple - there is a physical trigger, that when pulled moves a sliding contact into position between the main contacts, allowing current to flow to the motor GATE ASTER II BT Expert (Quantum Trigger) (Rear), An AEG's trigger system is generally quite simple - there is a physical trigger, that when pulled moves a sliding contact into position between the main contacts, allowing current to flow to the motor GATE ASTER II BT Expert (Quantum Trigger) (Rear), An AEG's trigger system is generally quite simple - there is a physical trigger, that when pulled moves a sliding contact into position between the main contacts, allowing current to flow to the motor GATE ASTER II BT Expert (Quantum Trigger) (Rear), An AEG's trigger system is generally quite simple - there is a physical trigger, that when pulled moves a sliding contact into position between the main contacts, allowing current to flow to the motor

An AEG's trigger system is generally quite simple - there is a physical trigger, that when pulled moves a sliding contact into position between the main contacts, allowing current to flow to the motor. The trigger spring returns it to its resting position when released. Over time the trigger contacts can bend, arc (carbon), or burn away completely, especially with higher voltage batteries. To improve the reliability of this design, MOSFET's can be installed.

MOSFET's are an often misunderstood part in airsoft. Manufacturers co-opted the term when designing smart control units for airsoft gearboxes, and it has stuck in the zeitgeist. Realistically a MOSFET is a simple regulator that sits between your battery and motor, storing power. When the trigger is pulled, the MOSFET supplies the power to your motor in a more regulated manner, drastically reducing wear on the trigger contacts, and making your gun more reliable in the process.

Manufacturers started to add more capability to their trigger systems, however they're still broadly referred to as MOSFET's. This broader feature set typically has things like Active Breaking (slowing your motor down), programmable burst fire, low voltage detection, pre-cocking, and so much more.

Replacing your gun's trigger system can unlock a world of potential, and even greater customisation, allowing you to tweak the trigger pull, rate of fire, and even fire modes. You have supreme control, and best of all, once it's installed, it's just a case of using the programming interface (dedicated wire, app on your phone, or via trigger pulls etc.).

GATE are a manufacturer of airsoft trigger systems based in Europe, pushing the envelope on what's possible from an AEG. Originally a producer of MOSFET's, they pivoted to offering more substantial features, and delving into significant R&D to ensure they became the defacto standard for trigger upgrades. Their Titan series took the world by storm; optical sensors instead of microswitches or trigger contacts, adjustable trigger sensitivity, pre-cocking, burst fire, programmable fire selector, binary trigger, adjustable ROF, and so much more. Following up with the equally impressive ASTER, and you can see how they became the biggest name in trigger systems in airsoft.

The GATE ASTER II Bluetooth EXPERT is a complete trigger system for V2 gearboxes; designed with M4's and M16's in mind. It is more than just a MOSFET - it has a lot of clever features integrated into its design from the ground up, giving you impressive capability. Outfitted with bluetooth 5.2, you can connect to your Android/iOS device via the app to adjust settings on the fly.

In the box you get a Quantum trigger, giving you everything you need to make the most out of the ASTER II. This version is rear wired.

The ASTER allows you complete control -  set the trigger sensitivity (35 sensitivity options for the first milimeter, and a total of 680 sensitivities for the full range). In other words, you can tweak it exactly to your preference. Similarly, you can enable modes like pre-cocking for supreme trigger response.


  • Brand: Gate
  • ABT2-R
  • Availability: In Stock
  • €104.99
  • Ex Tax: €104.99
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Tags: GATE ASTER II BT Expert (Quantum Trigger) (Rear), ABT2-R, Gate, Triggers & MOSFET's, AEG Parts (Internals)