JeffTron LEVIATHAN ASG EVO 3 Optical + Anti-Reversal Latch

JeffTron Leviathan ASG EVO 3 Optical

Leviathan ASG EVO 3 Optical is an ETU unit with Bluetooth, designed for installation in the EVO gearbox from ASG. Thanks to optical sensors for shot detection and fire selector, and the option to add a foam pad, it allows configuration of a true hair trigger mode. With the JeffTron app, you can live-configure firing modes (individually per selector position), RoF, active braking, pre-cocking (after installing CNC latch), virtual magazine and more. Input and output ports support external accessories like flashlights, electric magazines, or empty mag sensors. The unit is protected with conformal coating. It's compatible with high-speed builds including DSG gears (with CNC latch), and is fully prepared for brushless motors like Warhead. All changes made in the app are saved in real-time to the unit's memory. The unit retains the bolt catch function and shot interruption on empty mag as on original ASG ECU, and this feature can now be easily disabled via the app.

Key Features

• Bluetooth programming via JeffTron mobile app (iOS/Android incl. smartwatches)
• Hair trigger – adjustable with foam pad
• Optical sensors for shot and selector cam detection
• 9 firing modes including Binary Trigger and Virtual Magazine
• Adjustable active braking
• Pre-cocking function for instant SEMI response
• Ready for brushless motors (Warhead, T238, Specna Arms Dark Matter, etc.)
• Complete wiring with T-DEAN connector, no soldering needed
• Motor mode + output delay for powering drum mags, tracer units or bolt-catch sensors

Technical Specifications

• Gearbox type: ASG EVO
• Programming: Bluetooth app (Android / iOS incl. smartwatches)
• Cycle detection: Optical sensor on sector gear
• Selector detection: Optical sensor with sticker
• Wiring: Teflon (AWG16 & AWG22), front-wired
• Voltage: 8.4–17 V (NiMH, LiPo, LiFe)
• Protections: Current, temperature, undervoltage
• RFTS support: No
• DSG support: Yes
• Accessory support: Input & output ports

Gearbox Compatibility

• ASG Scorpion EVO 3 A1 (Pro-line & Sport-line incl. 1st gen gearboxes)
• ASG Scorpion EVO 3 A1 B.E.T.
• ASG Scorpion EVO 3 A1 Carbine
• Compatible with standard and CNC triggers

Package Contents

• Leviathan ASG EVO 3 Optical with wiring
• 2x screw pads for securing inside gearbox
• Anti-reversal latch with spring and special screw
• Black Leviathan sticker 40 mm
• Foam for gearbox fit
• Installation manual (download link only, English)

Warnings

• Installation requires advanced AEG gearbox knowledge.
• Follow the manual precisely, including proper optical sensor alignment.
• Most common errors: misaligned sensor, poorly attached sticker, incorrect sector gear height.
• Calibration via app is mandatory before use (light level, cycle, selector position).
• Download the English manual here.
• Compatible smartwatches: Apple Watch Series 3+, Samsung Galaxy Watch 4+, Google Pixel Watch, Mobvoi TicWatch Pro 5, Hublot Big Bang e Gen 3, TAG Heuer Connected Calibre E4, Montblanc Summit.