Matrix / AIM Lipoly Ready 8mm Complete Gearbox for M4 / M16 series Airsoft AEG ( M130 / Back Wiring)

$110.00 $95.00

Model: GB-Monster-130B

13 Customer Reviews

by Chris M. on 01/26/2015
"I have three of these gear boxes and the last one made me rather angry.

The first one has worked out fine.
The second one had way too much wiring in it! And was fitted to large taymia. I dont do soldering so this just made the wires even longer when I put a conversion set on it.

The last one though has made me rather angry. Since I dont mind taymia connection that was not the issue. But what was the issue was the wiring to the back! It wasnt even an inch long! This is a problem if you run a buffer tube and crane stock! So now im having to have the whole thing rewired. Please someone tell them to do better quality control.
by kyle c. on 12/05/2014
Gear box was fully assembled
look good at first

wiring is shotty and motor wires are not long enough
Motor cut threw wires
connectors fell off easily

Stock classic army wiring is 10 Times better
For the price could have bought the good parts in it plus some
would not recommend unless you have wiring with no gearbox than its a perfect fit
by Maxim K. on 10/06/2014
"solid gearbox, 8mm .
Too bad semi doesn't work, it doesn't align properly to line up with the motor.
The after 3 month of shooting every other weekend and metal teeth rack on the piston broke in half.
The gears and the bearings are not compatible with any other brand gears or bushings/bearings.
Cylinder and cylinder head or good, as well as the spring guide.

ended up selling the shell for parts and scavenging the guide, spring, switch and wiring.

Matrix / AIM Lipoly Ready 8mm Complete Gearbox Set for M4 / M16 series Airsoft AEG (Monster Torque) - Wiring to the Back / Stock
*Motor Not Included / Sold Separately. Recommended Matrix Magnum Motor.

For Experienced players only. This complete gearbox set is essentially a pre-assembled complete reinforced / tune up kit for your M4 / M16 series AEG. Manufactured by Matrix Tactical Systems, one of the most established, reliable and well known Airsoft manufacture in the world. This gearbox is an affordable alternative over the Systema gearbox with 8mm bearing sets. The Mecha box shell is modeled after Systema's new gearbox design with thickened shell. With the more stabilized 8mm bearing set, this gearbox is more attractive than ever!

Manufacture: Matrix Tactical Systems. OEM: AIM. Matrix is the exclusive US Distributor for AIM Products.
Compatibility: Tokyo Marui, Classic Army, Echo1, JG, G&G, G&P, Echo1, DBOY, SRC, A&K, KWA and compatible models. Modification might be required for certain brands.
Matrix Tactical Systems Gearbox Models : Available in Monster Torque and Tornado High speed. Front wire and rear wire.

- Systema / G&P / Classic Army Type 8mm Enhanced "Thick Type" Mecha Box Shell.
- M130 Spring. Velocity out put for this gearbox is around 400~480 FPS.
- Low Resistance / High Capacity / High conductivity / Wire & switch assembly Set.
- High Grade 8mm Metal Bearing Set Installed. Providing enhanced stability over the 6mm and 7mm gearboxes
- Ball bearing CNC Stainless metal spring guide.
- Matrix Ultra High Performance High Speed Piston with Metal full teeth strip.
- CNC Stainless Steel Cylinder Head.
- Reinforced Silent Polycarbonate Piston Head.
- Steel Gear Set
- Reinforced Nylon Smooth Selector plate and tappet plate.
- Reinforced Ball Bearing Polycarbonate Piston Head.
- Reinforced Matrix Monster (Torque Up) Gear set Installed.

Complete Gearbox Disclaimer:
We have compiled a series of videos for AEG take down, assembly and gearbox for your reference. Recommended for experienced players only. A "gearbox" virtually never breaks, offers spare parts for all components. All gearboxes are sold as complete set of parts and "AS IS". All the gearbox are directly from manufacture. Buyer responsible for fine tuning and proper installation. is not responsible for shimming it perfectly or playing the game of airsoft for you.
For more information on complete gearboxes, please visit: Complete AEG Gearbox

A good gearbox on par with the KWA M4 gearbox. One advantage of this gearbox over the KWA is that all 6 bearings are standard size 8mm bearings you can buy. Making it much easier to work on. The monster gear set can power up to M170 spring combined with magnum motor. The inner wall of the gearbox is reinforced, just like the Systema new type Mecha box shell, with all the inner walls thickened. Easy installation for most major brands of M4 / M16 series AEG. Great performance.
To install this gearbox on a MOD5 series, although it is a version 2, the nozzle, selector plate and trigger are not the same. Slight work and gearbox knowledge will be required.

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