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JeffTron
JeffTron is a Czech company founded in 2011 that specializes in the development and production of electronic devices for airsoft guns. The company was founded by active airsoft players who started producing the first MOSFET units in the Czech Republic. JeffTron has since become a global leader in ETU and MOSFET technology. Their flagship product is the Leviathan Optical – an advanced unit with Bluetooth, available for V2, V3, NGRS gearboxes and ASG EVO 3. Everything can be configured using the JeffTron mobile app, which also supports smartwatches (Android / iOS).
JeffTron is a Czech company founded in 2011 that specializes in the development and production of electronic devices for airsoft guns. It is based in Heřmanův Městec and was founded by active airsoft players who began producing the first MOSFET units in the Czech Republic and shared their expertise on early online forums. Through constant development and innovation, JeffTron has become a world-class leader in ETU and MOSFET systems. Their flagship product is the Leviathan Optical – an advanced unit with Bluetooth, available for V2, V3, NGRS gearboxes and ASG EVO 3. Everything can be configured easily through the JeffTron mobile app, which also supports smartwatches (Android / iOS).
A recent addition to their lineup is the Scylla unit, a direct competitor to the GATE ASTER, while the Leviathan challenges the GATE TITAN. JeffTron thus offers a full alternative to established brands, with the added benefit of local manufacturing and support. In addition to ETU units, their classic MOSFETs in various configurations and active brake units remain popular, offering higher rate of fire, trigger contact protection, and extended battery life. JeffTron proves that top-tier electronic upgrade systems can be made right in the Czech Republic.
20,89 € In StockJeffTron MOSFET II: JeffTron
JT-MOS-S2
MOSFET II by JeffTron – version without wiring. Installation outside the gearbox. For AEG replicas without active braking. Improves rate of fire and extends battery life. Supports springs up to M210. Ideal for experienced technicians – no pre-installed wires.
20,89 €In Stock
13,70 € In StockJeffTron Wiring for LEVIATHAN / SCYLLA V2 - Rear: JeffTron
JT-WIR-V2ST
Wiring for LEVIATHAN / SCYLLA V2 by JeffTron, version with rear wiring. Original replacement wires for the Leviathan V2 Optical and Scylla V2 ETU units. High conductivity and durable PTFE insulation. Wire length 270 mm between battery connector and ETU in gearbox.
13,70 €In Stock
109,11 € 141,50 € In Stock-23%JeffTron LEVIATHAN V2 Optical (Front Wired) + CNC EDGE Trigger...: JeffTron
JT-LEV-V2F-ER
Leviathan V2 Optical ETU unit by JeffTron with front wiring. Includes a CNC aluminum EDGE trigger by Retro Arms (red). For gearbox V2 and V2.5 (M4, M16, MK18, HK416, SR-25, and other platforms). Bluetooth programming via JeffTron app (iOS / Android). Hair trigger mode with just 0.13 mm of travel. RFTS system – realistic trigger resistance simulation.
109,11 € 141,50 €In StockReduced price!
115,87 € 154,19 € In Stock-25%JeffTron LEVIATHAN V2 Optical (Front Wired) + CNC CURVED...: JeffTron
JT-LEV-V2F-CB
Leviathan V2 Optical ETU unit by JeffTron with front wiring. Includes a CNC aluminum CURVED trigger by Retro Arms (black). For gearbox V2 and V2.5 (M4, M16, MK18, HK416, SR-25, and other platforms). Bluetooth programming via JeffTron app (iOS / Android). Hair trigger mode with just 0.13 mm of travel. RFTS system – realistic trigger resistance...
115,87 € 154,19 €In StockReduced price!
95,15 € 135,07 € In Stock-30%JeffTron LEVIATHAN V2 Optical (Front Wired) + CNC CURVED...: JeffTron
JT-LEV-V2F-CR
Leviathan V2 Optical ETU unit by JeffTron with front wiring. Includes a CNC aluminum CURVED trigger by Retro Arms (red). For gearbox V2 and V2.5 (M4, M16, MK18, HK416, SR-25, and other platforms). Bluetooth programming via JeffTron app (iOS / Android). Hair trigger mode with just 0.13 mm of travel. RFTS system – realistic trigger resistance simulation.
95,15 € 135,07 €In StockReduced price!
28,12 € 31,29 € In Stock-10%JeffTron Tactical Dual Switch for LEVIATHAN - Black: JeffTron
JT-TDS-BK
Tactical Dual Switch by JeffTron – compatible with Leviathan units with optical sensor (Optical). Used to activate functions such as 3-round burst, chamber lighting, drum mag winding and more. Dual configuration: ON/OFF toggle switch + pressure pad. Mounted on 22 mm RIS rail.
28,12 € 31,29 €In StockReduced price!
11,42 € In StockJeffTron Stock Wiring Extender, 34 cm - T-Dean: JeffTron
JT-STO-EX
Wiring extension to stock by JeffTron with a length of 34 cm and T-Dean (male / female) connectors. Adapter for routing wiring to the stock in guns with front wiring or wiring above the gearbox. Ideal accessory for LEVIATHAN V3 Optical or MOSFET V3 units. Universal use also as a 34 cm extension cable.
11,42 €In Stock
14,84 € In StockJeffTron Wiring for LEVIATHAN / SCYLLA V2 - Front: JeffTron
JT-WIR-V2F
Wiring for LEVIATHAN / SCYLLA V2 by JeffTron, version with front wiring. Original replacement wires for the Leviathan V2 Optical and Scylla V2 ETU units. High conductivity and durable PTFE insulation.
14,84 €In Stock
104,88 € 141,50 € In Stock-26%JeffTron LEVIATHAN V2 Optical (Front Wired) + CNC FLAT Trigger...: JeffTron
JT-LEV-V2F-FB
Leviathan V2 Optical ETU unit by JeffTron with front wiring. Includes a CNC aluminum FLAT trigger by Retro Arms (black). For gearbox V2 and V2.5 (M4, M16, MK18, HK416, SR-25, and other platforms). Bluetooth programming via JeffTron app (iOS / Android). Hair trigger mode with just 0.13 mm of travel. RFTS system – realistic trigger resistance simulation.
104,88 € 141,50 €In StockReduced price!
16,70 € In StockJeffTron Wiring for LEVIATHAN V3 Optical - Front: JeffTron
JT-WIR-V3
Wiring for LEVIATHAN V3 Optical by JeffTron with top-wired configuration (AK). Original replacement wires for the ETU unit Leviathan V3 Optical. Equipped with T-Dean connector. High conductivity and durable PTFE insulation.
16,70 €In Stock
15,86 € 19,03 € In Stock-17%JeffTron Wiring for LEVIATHAN NGRS Optical - Rear: JeffTron
JT-WIR-NG
Wiring for LEVIATHAN NGRS Optical by JeffTron – rear-wired version. Original replacement wires for Leviathan NGRS Optical ETU units. Designed exclusively for Tokyo Marui Next-Gen Recoil System replicas. Includes unsoldered T-Dean connector and heat shrink set. High conductivity and durable PTFE insulation.
15,86 € 19,03 €In StockReduced price!
21,06 € In StockJeffTron Micro MOSFET III with Wiring: JeffTron
JT-MOS-W7
Micro MOSFET III by JeffTron – with wiring. Installation outside the gearbox. Easy to position thanks to compact size. For AEG replicas without active braking. Improves rate of fire and battery efficiency. Suitable for springs up to M170. Ideal for experienced technicians.
21,06 €In Stock
154,19 € In StockJeffTron LEVIATHAN V2 Optical (Front Wired) + CNC EDGE Trigger...: JeffTron
JT-LEV-V2F-EB
Leviathan V2 Optical ETU unit by JeffTron with front wiring. Includes a CNC aluminum EDGE trigger by Retro Arms (black). For gearbox V2 and V2.5 (M4, M16, MK18, HK416, SR-25, and other platforms). Bluetooth programming via JeffTron app (iOS / Android). Hair trigger mode with just 0.13 mm of travel. RFTS system – realistic trigger resistance simulation.
154,19 €In Stock
104,88 € 141,50 € In Stock-26%JeffTron LEVIATHAN V2 Optical (Front Wired) + CNC SPEED...: JeffTron
JT-LEV-V2F-SR
Leviathan V2 Optical ETU unit by JeffTron with front wiring. Includes a CNC aluminum SPEED trigger by Retro Arms (red). For gearbox V2 and V2.5 (M4, M16, MK18, HK416, SR-25, and other platforms). Bluetooth programming via JeffTron app (iOS / Android). Hair trigger mode with just 0.13 mm of travel. RFTS system – realistic trigger resistance simulation.
104,88 € 141,50 €In StockReduced price!
23,05 € In StockJeffTron MOSFET V2: JeffTron
JT-MOS-S3
MOSFET V2 by JeffTron – version without wiring. Installed directly in the V2 gearbox to save space for the battery. Includes trigger contacts. For AEG replicas without active braking. Increases rate of fire and battery life. Suitable for springs up to M170. Ideal for experienced technicians – no pre-installed wires.
23,05 €In Stock
34,55 € In StockJeffTron MOSFET V2 with Wiring: JeffTron
JT-MOS-W3
MOSFET V2 by JeffTron – version with wiring. Installed directly in the V2 gearbox to save space for the battery. Includes trigger contacts. For AEG replicas without active braking. Increases rate of fire and battery life. Suitable for springs up to M170. Ideal for experienced technicians.
34,55 €In Stock
23,05 € In StockJeffTron MOSFET V3: JeffTron
JT-MOS-S4
MOSFET V3 by JeffTron – version without wiring. Installed directly in the V3 gearbox to save space for the battery. Includes trigger contacts. For AEG replicas without active braking. Increases rate of fire and battery life. Suitable for springs up to M170. Ideal for experienced technicians – no pre-installed wires.
23,05 €In Stock
34,55 € In StockJeffTron MOSFET V3 with Wiring: JeffTron
JT-MOS-W4
MOSFET V3 by JeffTron – version with wiring. Installed directly in the V3 gearbox to save space for the battery. Includes trigger contacts. For AEG replicas without active braking. Increases rate of fire and battery life. Suitable for springs up to M170. Ideal for experienced technicians.
34,55 €In Stock
35,40 € In StockJeffTron MOSFET V3 with Wiring above the Gearbox: JeffTron
JT-MOS-W6
MOSFET V3 by JeffTron – version with wiring above the gearbox. Installed directly in the V3 gearbox to save space for the battery. Includes trigger contacts. For AEG replicas without active braking. Increases rate of fire and battery life. Suitable for springs up to M170. No soldering required.
35,40 €In Stock
21,06 € In StockJeffTron AEP MOSFET (JST Connector): JeffTron
JT-MOS-NG
AEP MOSFET by JeffTron – version with pre-installed wiring and JST connector. Boosts rate of fire and extends battery life for electric airsoft pistols. Designed for AEP guns by Cyma, Tokyo Marui, Umarex, and Double Eagle. Ideal for experienced technicians.
21,06 €In Stock
34,13 € In StockJeffTron Active Brake II with Wiring: JeffTron
JT-BRK-W2
Active Brake II by JeffTron – wired version. Suitable for setups up to M210 spring. Professional MOSFET with active braking for AEG replicas. Increases rate of fire and battery life, protects internal components. Fixes double-shot issue in SEMI mode. For experienced airsoft technicians only.
34,13 €In Stock
29,52 € In StockJeffTron MOSFET II with Wiring: JeffTron
JT-MOS-W2
MOSFET II by JeffTron – with wiring version. Mounted outside the gearbox. For AEG replicas without active braking. Improves rate of fire and battery life. Suitable for springs up to M210. Ideal for experienced technicians.
29,52 €In Stock
121,29 € In StockJeffTron LEVIATHAN NGRS Optical M4 (Rear Wiring): JeffTron
JT-LEV-NG
Leviathan NGRS Optical control unit by JeffTron with rear wiring. Only for EBB guns by Tokyo Marui from the M4 Next-Generation Recoil Shock (NGRS) series. Also compatible with URGI, MK18, HK416, HK417 and SCAR-L (MK16) / SCAR-H (MK17). Bluetooth programming via JeffTron app (iOS / Android). RFTS system – realistic trigger feel.
121,29 €In Stock
102,34 € 141,50 € In Stock-28%JeffTron LEVIATHAN V2 Optical (Front Wired) + CNC SPEED...: JeffTron
JT-LEV-V2F-SB
Leviathan V2 Optical ETU unit by JeffTron with front wiring. Includes a CNC aluminum SPEED trigger by Retro Arms (black). For gearbox V2 and V2.5 (M4, M16, MK18, HK416, SR-25, and other platforms). Bluetooth programming via JeffTron app (iOS / Android). Hair trigger mode with just 0.13 mm of travel. RFTS system – realistic trigger resistance simulation.
102,34 € 141,50 €In StockReduced price!