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Home » Accessories & Parts » AEG Internal Parts » Gearbox » Version 2 Gearboxes

Matrix G3 Complete Gearbox Assembly for TM Compatible V2 M4 Airsoft AEGs
(Model: Front Wire / 400 FPS)

ID: 111704 (GB-MTX-STGBM4G3F)
STGBM4G3F
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MatrixS&T

$59.95

Model Options:
Front WireFront Wire
Rear WireRear Wire
Options:
350 FPS$59.00
400 FPS$59.95

Description

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Reviews

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Product Description

Features

  • Matrix G3 high performance complete gearbox assembly
  • High strength, reinforced aluminum alloy gearbox shell
  • Quick change spring design allows you to quickly change between different springs without disassembly of the gearbox
  • Integrated MOSFET for improved power usage, motor performance and trigger response
  • Microswitch trigger further improves trigger response and prevents arcing
  • 8mm ultra smooth bearings and bushings with upgraded internal parts
  • High grade low resistance wiring
  • Factory configured and tuned to ~400FPS (using 363mm standard barrel, your results may vary)
The Newly improved G3 gearbox developed by S&T offers the same features found in the G2 series such as a microswitch trigger, improved steel gears, full steel teeth piston, and aluminum cylinder. New to the G3 series gearboxes is an improved QD spring system which makes it even easier to swap to different strength springs without disassembly. The inline MOSFET features over discharge protection and the electric trigger features a magnetic sensor for improved responsiveness. Each gearbox is factory configured and tuned for a comfortable ~400FPS (using a standard 363mm barrel) to be ready to go for any type of build you desire.

Manufacturer: Matrix / S&T

3 Customer Reviews

(Write a review)

by Michael B. on 01/22/2025
"I give this thing 5 stars. Has superb trigger response on a 21k - 46k motor, Good quality matrix etu. Its got the magnetic trigger sensor instead of the oldchool microswitch in the g2. Solid internals and good shimming from factory. I use this gearbox for all my base builds. Only con is the g3 has a propietary trigger cant upgrade to a flat trigger. this gearbox keeps up with cyma platinum performance for budget builders. I run this gearbox with all shs aluminum internals except a shs high speed polymer piston paired with a shs balanced 16 tpa 46k rpm and get insane trigger response and 30 rps with a 11.1 lipo on stock gears!!!
by Bobby A. on 11/19/2024
"Great value for the price, purchased to revive my old G&G combat machine backup gun. Trigger response is phenomenal with an 11.1, and it’s been shooting a pretty consistent 390. Only complaint is that the gearbox is a little noisy, but that can be fixed.
by Davis D. on 10/16/2025
"This gearbox is good for the price; however, it does have misleading information such as claiming 8mm ball bearings, which would make one assume all 3 gears have such bearings but that is not true, only the bevel gear has one the rest are metal bushings, which have significantly worse performance than ball bearings. The rest I really cant complain about for the price, it has an all-metal teeth piston which is surprising at this price point, however compression was poor, which is to be expected at this price point with a plastic nozzle and odd cylinder head design. Plus a plastic spring guide with no bearings around it may risk damage at higher fps springs. The gears also seem like they would likely face a lot of wear with stronger springs. So it would be optimal not to put a high-power spring in this gearbox if you plan to keep it stock. The ETU works amazingly though, so If you plan to upgrade this gearbox I would suggest improved compression components and stronger gears, plus relacing the other bearings with ball bearings. Overall, the performance of the etu is outstanding and if you plan to keep the gearbox stock with the 300-400 fps springs no upgrades will be necessary.

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MatrixS&T

About Matrix

Established in 2001 for Airsofters by Airsofters. Team Matrix thrive on the vision to better the sport of Airsoft with affordable high quality Airsoft equipment. With decades of experiences as Airsoft enthusiasts ourselves, we live, sleep, and breathe Airsoft. Matrix offers a wide selection of skirmish grade replicas from rifles to pistols, a wide variety of accessories, and tactical equipment from helmets to boots. It is the Matrix mission to prepare every Airsoft shooter the perfect experience!

About S&T

S&T is a group of Airsoft enthusiasts that produces rifles and parts based on the trends in the Airsoft industry. Their mission is to supply a wide range of quality products with the most competitive pricing for dealers and consumers alike. S&T was founded in 2009 with their HQ office located in Hong Kong, a subsidiary office in Japan, as well as Airsoft / Airgun manufacturing facilities in China.