G&G Armament - Electronic Trigger Unit 2.0 & MOSFET 4.0 with Regular Trigger for V2 Gearbox (Rear Wired)

G&G Armament - Electronic Trigger Unit 2.0 & MOSFET 4.0 with Regular Trigger for V2 Gearbox (Rear Wired)

So, thinking about upgrading your airsoft rifle but not sold on flat triggers? The G&G ETU 2.0 and MOSFET 4.0 with a regular trigger keeps things familiar while delivering a serious performance boost where it actually matters. Designed for Version 2 gearbox platforms, this setup replaces traditional mechanical trigger contacts with a modern electronic system—giving you faster response, smoother cycling, and improved long-term reliability without changing the feel you’re used to.

At its core, the ETU (Electronic Trigger Unit) reads your trigger input digitally, while the MOSFET 4.0 handles efficient power delivery from your battery to the motor. This reduces electrical resistance and eliminates the wear caused by arcing in standard trigger contacts. The result is a noticeably sharper trigger response—especially useful in semi-auto engagements where every shot counts in airsoft CQB scenarios.

Unlike the flat trigger variant, this version features a traditional curved trigger, making it ideal for players who prefer a more classic feel or are upgrading from stock AEG setups. You still get programmable firing modes, allowing you to switch between full auto and 3-round burst depending on your play style or site rules. The built-in low battery indicator is another handy addition, helping you keep track of LiPo levels during longer game days and avoid damaging your battery.

Rear wired for stock-based battery configurations, this unit is commonly used in M4-style airsoft rifles and other V2 gearbox platforms. Whether you're repairing a worn-out trigger system or upgrading for better responsiveness, this is a reliable, no-nonsense upgrade that enhances performance without overcomplicating your build.

It keeps the feel you know—but upgrades everything happening behind the scenes.

Highlights

• ETU 2.0 and MOSFET 4.0 system for V2 airsoft gearboxes 
• Traditional curved trigger for a familiar feel
• Programmable firing modes: full auto and 3-round burst
• Rear wired setup for stock battery configurations
• Improves trigger response and gearbox efficiency
• Protects trigger contacts from electrical wear and arcing
• Low battery indicator for LiPo protection
• Ideal upgrade for M4 and similar airsoft AEG platforms

What's Included

• ETU 2.0 Electronic Trigger Unit 
• G&G Standard Trigger
• V2 M4/M16 Selector Plate
• Fused MOSFET and Battery Wire Harness
• Motor Wire Harness
• Heat Shrink Wrap
• Installation Leaflet

Technical Specifications

• Brand: G&G Armament
• System: ETU 2.0 with MOSFET 4.0
• Gearbox Compatibility: Version 2
• Wiring Configuration: Rear Wired
• Trigger Type: Standard Curved Trigger
• Firing Modes: Full Auto / 3-Round Burst
• Battery Compatibility: LiPo Recommended
• Application: Airsoft AEG upgrade or replacement