JeffTron is a Czech brand specializing in the design and manufacture of advanced electronic trigger units (ETU) and MOSFET modules for electric airsoft replicas. Founded in 2011 by Ing. Filip Nemec of Hermannova Město, Czech Republic, the company quickly earned international recognition thanks to its flagship product, the Leviathan — one of the most feature-rich and configurable AEG control systems on the market. JeffTron's motto is "Make your gun smart" — and that's exactly what every product delivers: intelligent, digital replica management that takes performance to an entirely new level.
History and Founder
JeffTron was established in 2011 in response to growing demand from advanced airsoft players for electronics to replace conventional mechanical trigger contacts. Traditional metal contacts wear down under electrical arcing and limit the scope of programmable functions. From the start, JeffTron focused on optical and electronic sensors to eliminate these issues — combined with wireless smartphone configuration, this made the Leviathan system a product without real competition in its price segment. Today, JeffTron products are sold in airsoft shops worldwide and are the go-to choice for airsoft technicians pushing replicas to the highest level.
The Leviathan System — Core of the Lineup
JeffTron's flagship offering is the Leviathan module family — advanced electronic trigger units. The Leviathan V2 is the base module designed for the most popular V2 gearboxes (M4/AR-15 platforms), offering active motor brake, ROF limiting, and single-shot mode. The Leviathan V2 Optical replaces the mechanical trigger contact with an optical sensor, eliminating contact wear and delivering instant trigger response. The Leviathan V3 Optical supports V3 gearboxes used in AK replicas. The Leviathan EVO3 is designed for replicas running the EVO 3 gearbox. The Leviathan NGRS Optical is dedicated to Tokyo Marui Next Generation Recoil Shock replicas. The latest addition is the Scylla V2 series — a system combining a multi-function MOSFET with a control module.
Advanced Features and Configuration
Leviathan models equipped with wireless connectivity allow full configuration of the replica's electronics via a dedicated app for iOS and Android smartphones — no disassembly, no soldering, done in seconds. Features include: active motor brake adjustment (reducing cycle time and improving trigger response), ROF limiting, firing modes: semi, burst (2–20 rounds, programmable), timed auto, and full-auto. The RFTS (Real Firing Trigger Simulation) system, available on models bearing that designation, simulates the physical resistance of a real trigger — resistance builds during actuation and releases after the shot. Empty magazine detection follows the original replica's native mechanism. All Leviathan modules are compatible with LiPo 2S–4S and LiFe 3S–4S batteries.
JeffTron at Militaria.pl
At Militaria.pl you'll find JeffTron Leviathan modules suited to popular gearbox platforms — both V2 versions for M4/AR replicas and V3 for AK platforms. It's an investment for the player who wants to get the most out of their replica: lightning-fast trigger response, electronics protection, and the ability to fine-tune firing characteristics to match their own playstyle. JeffTron — because every replica deserves intelligent control.
