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.