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

$110.00 $95.00

Model: GB-Monster-130B
Location: U11-049

9 Customer Reviews

by michael l. on 03/27/2014
"I love this gear box I built my own custom dmr I used a g&p upper n lower receiver it fits perfect its super solid im using a Evike "Monster" Torque-Up High Performance Airsoft AEG Motor its a little loud but its not big deal to me im also running a 9.6 numchuck and it has agood rof 17bbs a second trigger response is pretty good better then most

1.sounds smooth
2.solid build
3.amazing power
4.460fps w/9.6v

2.460 fps feels like 550 from 60ft away shot through my friends bdu n stuck in his arm w/.28
by Francisco S. on 11/25/2013
"This gearbox by far worth the money i put it on my Javelin M4 CQB and it has well over the power to punch through two soda cans! 5/5
by Heidi A. on 06/24/2013
"Well, I'm not usually one to write reviews, but I was so impressed by this gearbox I couldn't help it. I chose this gearbox because I had previously bought the AIM torque up motor and was very impressed with it, so I decided this gearbox would be a great match for it. I'll stop boring you with why I got this and get right into the breakdown.

The shell is a real nice heat treated matte finished shell that looks great and fells really sturdy. The gears are also very good quality, but are fairly loud even when shimmed properly. This is probably just because they're new and will probably quiet up later. The 8mm bearing are just your standard bearings, and look like they have nice build quality. The trigger is a standard M4 style trigger, and makes for great contact with the wiring for pretty decent trigger response, even though the wiring does not even contain a fuse. For reasons I can't explain, however, when shooting in semi mine always stopped about one quarter rotation further than it should, even with corrected AoE (get a sorbopad with this, you'll need it). This really isn't that big of a deal, but it does put more strain on the gearbox when not in use, but it cycles cleanly, so I can forgive this. The spring guide was a little lose when I opened it, but it was fine after I tightened it. The spring is heat treated, and pretty good quality. The piston had some raised marks from manufacturing, which can be cut off with an exacto knife. If you want to but a new piston head on though, your out of luck. I tried my hardest to loosen it but that damn thing wouldn't even budge! At least the quality is decent and the O ring has perfect seal. The cylinder is a type O (non ported) aluminum cylinder and is very good quality. The cylinder head is a one piece steel head that is very sturdy. The air nozzle is fantastic, perfect air seal and has the plus looking thing (no idea what the proper term for it is) at the end which is great. Unfortunately I couldn't use it with my SCAR because the air nozzle is too short, but I wish I could. Tappet and selector plates are just standard, nothing fancy or special there.

Overall, this gearbox exceeds expectations, but just barely falls short of a tenouttaten because of the noisy gears, lack of fuse, slightly off semi cycling, and sub par manufacturing on the piston. I'm using this gearbox with a 363mm 6.01 tightbore, and .28g G&G BBs and I'm hitting 375 fps and getting a 4 inch cluster at 25 yds. Very impressed, you will be too.

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.

This product was added to our catalog on Wednesday 02 September, 2009.

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