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T238 Programmable Mosfet For LH AUG Vector TAR21

T238 Programmable Mosfet For LH AUG Vector TAR21

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Electronic Fire Control DTU Module Digital Trigger for LH AUG Vector TAR21


1.Support up to 14.8V batteries
2.Low battery voltage protection:the default setting is 7.4V battery.Change the battery when hearing‘beep,beep,beep,beep’4 times low voltage warning sound.
3.Fast speed of respond.This module is powered by small current,the current flow through the MOSFET directly to the motor,provide higher current to increase the rate of fire and speed of respond.
4.Auto-loading function is designed for mags with motor insert,when changing the mag,the mag motor will run automatically for a period of time and it can be programmed by 9th option.
5.ETU overheat protection.When the DTU is overheated,after the trigger is pulled,the motor will give a beep prompt until it is automatically restarted after cooling.
6.Block-up protection.When the gearbox is block-up,the system stops working and emits an elongated’beep’sound.Please check the gearbox immediately by power off.
7.Multiple shooting modes.The system includes multiple shooting modes,those modes canbeselected by fire select switch.can be selected by fire select switch.
8.PRE-COCKING.The default postition of the piston is adjustable is semi-auto model.Per-cocking function can be implementing,zero trigger delay.
9.Active brake.The energy thay support the active brake function comes from the inertia of motor, stop the piston without delay.The effect of active brake is significant on high torque motor.
10.Gearbox protection.the active brake prevents the over-spin of gears,this solve the issue that single shot changes to multiple shot under high voltage.meanwhile,the spring is fully released in semi-auto model and parts in the gearbox are not under strain,increase the life cycle of your gearbox
11.Rate of fire adjustable.The gap between two single shots can be progtammable

Package Content:

  • Electronic Fire Control DTU Module   X1
  • T238 Metal Sticker   X1

Shooting Modes:

  • SAFE:This model is completely the same as original safe model.The trigger is stopped by safety lever.
  • SEMI:This model can be programmed to implementing semi-auto,double stroke single shot,3-rounds burst to 6 rounds burst,the default model is semi auto.
  • AUTO:This model can be programmed to implementing full-auto,3-round burst,6-round burst and 9-round burst,the default model is full-auto.

Main Features:

  • Overheat protection
  • Operating voltage:7.4-14.8V
  • Active break tech&Piston reset
  • Multiple programmable shooting model
  • Maximum Inrush current is 240A,maximum brake current is 100A


How to enter programming model:

  1. Power off the gearbox > put the selector on AUTO>Power on and pull the trigger in 3s>When hear 2 long beeps then release the trigger>You are in programming model now.
  2. Power on the gearbox>put the selector on SEMI>Pull and hold the trigger for 10s>When hear 2 long beeps then release the trigger>You are in programming model now.


  • This product requires soldering and wiring. It is recommended that installation is undertaken by an experienced technician. 

  • T238 Programmable Mosfet For LH AUG Vector TAR21

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