JeffTron LEVIATHAN V3 Optical + Trigger Adjustment Module - Black

JeffTron Leviathan V3 Optical with trigger adjustment module

Leviathan V3 Optical is an ETU unit with Bluetooth designed for installation in a gearbox V3 following the TM standard. Thanks to optical sensors for detecting shots and fire selector position, and the option to insert a foam pad, you can configure a realistic hair trigger mode. The Real Feel Trigger System (RFTS) uses a spring to simulate real trigger resistance and adds a reset after each shot — developed in collaboration with gunsmiths. The JeffTron app allows real-time configuration of firing modes, rate of fire, active brake, pre-cocking, virtual magazine, and more. Input and output ports support accessories like flashlights, electric magazines, or empty mag sensors. The unit is protected with conformal coating and supports high-RoF builds including DSG gears. It's fully ready for Brushless motors such as Warhead. All app changes are saved to the unit in real-time. This version also includes a trigger adjustment module for Single-Stage (ideal for competitive shooting) and Two-Stage (realistic trigger break simulation). The module is 3D-printed and made specifically for gearbox V3 with Leviathan, providing an even more realistic trigger experience than RFTS alone.

Key Features

• Bluetooth programming via JeffTron mobile app (iOS / Android, incl. smartwatches)
• Hair trigger – with included foam pads
• Real Feel Trigger System (RFTS) – spring-based resistance and trigger reset
• Optical sensors for firing cycle and fire selector
• 9 firing modes including Binary Trigger and virtual magazine
• Active brake with adjustable strength
• Pre-cocking function for instant SEMI fire
• Brushless motor ready (Warhead, T238, Specna Arms Dark Matter, etc.)
• Complete wiring harness with T-DEAN connector, no soldering required
• Motor + output delay mode for powering peripherals like drum mags, tracers, or bolt-catch sensors

Technical Specifications

• Gearbox type: V3
• Programming: Bluetooth app (Android / iOS incl. smartwatches)
• Cycle detection: Optical sensor on sector gear
• Selector detection: Optical sensor with sticker
• Wiring: Teflon (AWG16 and AWG22), routed to front
• Voltage range: 8.4–17 V (NiMH, LiPo, LiFe)
• Protections: Overcurrent, overheat, undervoltage
• RFTS support: Yes
• DSG gear support: Yes
• Accessory connection: Input and output ports

Gearbox Compatibility

• AK47, AK74, Galil, Bizon with TM-standard V3 gearbox
• Tokyo Marui AK47 Next Generation (not NGRS)
• G36, XM8 with TM-standard V3 gearbox
• Tokyo Marui G36 Next Generation (not NGRS)
• ASG CZ 805 BREN
• AUG
• UAR with TM-standard V3 gearbox
• FAL / SA58 with TM-standard V3 gearbox (not vz.58)
• MP5K
• UMP with TM-standard V3 gearbox
• SIG 55X with TM-standard V3 gearbox
• S&T VSS or VAL

Package Contents

• Leviathan V3 Optical with wiring
• Screw and washer to secure unit in gearbox
• 2x foam pad (1mm and 2mm for trigger sensitivity)
• Fire selector stickers and Leviathan logo sticker
• Installation manual (English)

Warnings

• Installation requires advanced knowledge of AEG systems.
• Follow the manual precisely, especially the optical gear sensor position.
• Common errors include misaligned sensors, poorly attached selector stickers, and incorrect gear height.
• Unit calibration via app is required before first use (light tuning, shot cycle, fire selector positions).
• Compatible smartwatches: Apple Watch Series 3 and newer, Samsung Galaxy Watch 4 and newer, Google Pixel Watch, Mobvoi TicWatch Pro 5, Hublot Big Bang e Gen 3, TAG Heuer Connected Calibre E4, Montblanc Summit.