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Matrix / AIM Lipoly Ready 8mm Complete Gearbox for M4 / M16 series Airsoft AEG ( M160 / Front Wiring)

ID: 31565 (GB-Monster-160F)
Matrix (Tactical Gear)31565
4.7 stars, based on 6 reviews
Matrix / AIM Lipoly Ready 8mm Complete Gearbox for M4 / M16 series Airsoft AEG ( M160 / Front Wiring)
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Matrix / AIM Lipoly Ready 8mm Complete Gearbox Set for M4 / M16 series Airsoft AEG (Monster Torque) - Wiring to the front / hand guard
*Motor Not Included / Sold Separately. Recommended Matrix Magnum Motor.

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.
- M160 Spring. Velocity out put for this gearbox is around 500~600 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.

High Powered Complete Gearbox Disclaimer:
This complete gearbox set is a pre-assembled and complete kit for your M4 / M16 series AEG designed for use by experienced players and technicians only. Use of springs higher than M120 rating are intended for extreme, non-warranty upgrades only; component longevity and lifespan is not guaranteed. does not warranty airsoft guns or upgrade parts utilizing a spring rating higher than M120 or equivalent. Additional upgrades or component reinforcement may be required for reliability.

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.

California residents click here for Proposition 65 warning

6 Customer Reviews

(Write a review)

by erik m. on 12/10/2016
"Fantastic! I put it in an asg m15 that I use for practice only and its a wonderful upgrade to the stock gearbox. Runs like clockwork right out of the box and hits HARD! Man this thing is blowing through thin plywood and heavy gauge coffee cans @ about 50 feet. If you are looking for power and not shooting people at close range this is a really good bang for your buck. Oh, I almost forgot, paired it with the recommended high torque motor, and a good 12 volt LIPO, which I'm fairly certain is a necessity.

Here are a few mistakes I made (I'm kinda new to Airsoft): Be sure to upgrade your hop up, the 160 spring blew a hole through my bucking and knocked the gears off my hopup unit, I replaced it with a good quality rotary unit and its holding up well, get a hard bucking. Mosfet, mosfet mosfet! lol, After about 3000 rounds the switch contacts fried. Funny, I had a mosfet just laying around that I could have soldered in, but wanted to see how long it could go (testing forum theory). Get a good barrel, my stock aluminum barrel flopped around like a wet noodle, fortunately, the local brick and mortar sold me a used brass one real cheap which is closing my groups a lot better.

Can't think of much else, If you want a lot of power, and don't want to order a million mid grade parts it's for you. gonna go shop for some new switch contacts and a nice barrel now... ;)
by Greg I. on 06/28/2013
"I replaced my existing gear box that has a m120 spring with this one and all was fine at first.
I donít have a chrono but I can tell the BBs fly a lot faster.
The motor that came with M4 S-System was adequate(using 10.8 v batt) to work the new 160 spring.

But in less than 50 rounds the new gear box locked up... I was really bummed out.

What I found is that the piston head screw had come loose causing the spring bearings and baring alignment nut to get jammed up in the cylinder locking up everything.
So much for QA.

Anyway, I re-assembled the piston/bearing and used red lock tight on the screw to make sure this didnít happen again.
Got the gear box back together and into my M4 and so far itís been working fine.
Eventually I'll need a stronger motor as the rate of fire in auto is relatively slow.

As a result of the total jam up caused by a loose piston head screw, I can only give it 3 starts as it was a lot of work to fix it.
The gear box is really good, donít get me wrongÖ, its feels solid and appears to have excellent parts, but a loose screw?
by Jamey M. on 02/28/2012
"I just got this gearbox and it appears to be great. I had it checked out by a certified airsoft technician to ensure it was properly shimmed. To my surprise it was in perfect shimming condition so that was awesome. Unfortunately the piston broke as soon as we tested it. Upon further investigation the spur gear lost one or two teeth. Not sure why this happened even though I used the recommended Matrix Magnum motor with it. I am waiting on Evike to respond to exchange the unit or the broken parts. This appears to be a solid gearbox. Even though I had a misfortune of events, I believe this to be an awesome piece of gear. Not to mention that Evike stands behind all their products and have a great customer support base. The grease is very minimal so if you are opening this gearbox then you will need to add some grease. Please be advised that I was fortunate in getting a properly shimmed gearbox. You still need to have it checked prior to using as stated in the product description. I also highly recommend you use a certified airsoft technician to do this work unless you are very familiar with gearboxes. I hope this review helps out. Have fun!

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