The Zionarm Programmable ETU is the perfect upgrade trigger unit for you Version 2 gearbox
This ETU offers a wide range of preset configurations ranging from 2 round burst all the way to 5 round burst, with a binary trigger option
Compared to a regular trigger unit that uses trigger contacts, this ETU unleashes your AEG's maximum potential while also maintaining its reliability due to it being electronic activated
The burst modes and binary modes will help change the functionality of your AEG and offers a faster rate of fire without having to change the gears or pistons of you AEG
Very easy to program via trigger and selector feature that allows for changing firing modes quick and easy in a matter of seconds without any linking devices
To enter program mode you simply turn the fire selector twice from semi to auto and a beep will sound, pulling the trigger will cycle through the different firing modes