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EMG Platinum Complete Version 2 Gearbox w/ Motor for M4/M16 Airsoft AEG (Model: Rear Wired)

ID: 20787 (GB-EMG-MA009J-EM)
MA009J EM (helios logo)
EMG Platinum Complete Version 2 Gearbox w/ Motor for M4/M16 Airsoft AEG (Model: Rear Wired)
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MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.
Model Options:


  • High speed 13:1 short-stroked steel SHS gears and full metal rack piston
  • High torque neodymium magnet motor
  • Quick-change spring system allows for easy spring changes without needing receiver disassembly
  • 350-400 FPS estimated FPS (individual parts and build will affect FPS output)
  • Pre-built at the factory to ensure industry leading QC and parts quality
  • Hybrid 8mm ball bearing / steel bushings for optimal longevity and performance
  • Onboard electronic trigger
  • Wired to the rear with low-resistance silver-coated wire
The EMG Helios Platinum gearbox is the same gearbox you can find in our EMG Helios Umbrella Corporation AEG series. We know that today's airsoft player demands performance from premium internals, so we looked straight to the same upgrades that everyone buys and had them installed in a complete gearbox, right from the factory. By pairing EMG Helios reliability and quality control with durable and very popular upgrades from SHS, the Helios Platinum gearbox is a ready-to-go upgrade that you can install into your gun. SHS parts include: CNC machined aluminum cylinder head, CNC machined aluminum piston head, full metal rack piston, 8mm ball bearings, and high-speed 13:1 steel gears that are short-stroked 4 teeth for improved performance.

Manufacturer: EMG Helios


Connector Type: Deans
Compatibility: Most Version 2 Airsoft AEGs. QBS system may not be compatible with all receiver types
Material: Aluminum-zinc alloy, Silver coated low-resistance wiring
Pre-Installed Upgrade Parts:
  • 13:1 high-speed SHS steel gears (short-stroked 4 teeth)
  • SHS full metal rack piston
  • SHS CNC aluminum cylinder head
  • SHS CNC aluminum piston head
  • 8mm Ver2 gearbox shell with molded radiused cylinder window and reinforcements
  • High torque neodymium magnet motor (capable of 26 RPS with an 11.1V LiPo battery)
  • Onboard electronic trigger

About EMG

The EMG vision is to manufacture products the world has never seen before; products we would put our name on, and products that hit the spot! "EMG" (Evike Manufacturing Group) was spawned from the realization that if you want something done exactly the way you want it, you need to do it yourself, and we did just that.
We took our 16 years of knowledge as the market's lead retailer, our network of 300+ superior manufacturers, to work with inspiring top innovators in the firearms industry. That combined with the vision to invest into the Airsoft industry, an industry we believe in, EMG was born.

6 Customer Reviews

(Write a review)

by George T. on 04/11/2024
"I picked this up as a drop-in replacement for a complete M4 rebuild. Installation was easy. I'm currently using a KWA motor (not sure of the specs) however, the CYMA motor that came with it has some incredibly strong magnets in it. I tested the cyclic rate on both 2s and 3s, both were very responsive (3s on full auto is wild).

I haven't had an opportunity to field test the unit yet but from cursory testing I am hopeful.

For the money I would say this is well worth the investment.

by Hunter K. on 02/23/2024
"This is a very good gearbox. If you want an upgrade over your stock V2 gearbox that will last a long time, this is a very good option. It is not mind blowing or anything but nothing is for this price point.

This is the CYMA Platinum gearbox. It says EMG all over it but we all know the truth. Everyone should know by now that the CYMA platinum airsoft guns are some of the best affordable out-of-the-box guns on the market. With that said the quality you are getting here is very good. The only thing I had to do was a very minor re-shim and AOE correction. Compression was perfect as is. The motor included is a High Torque CYMA and it is an improvement over stock. I also replaced the CYMA MOSFET for a Perun V2 Hybrid only because I run Perun in everything.

The ROF and trigger response with the included spring and motor was very good even on a 7.4v Li-Po. It defiantly performs like an upgraded gearbox should.

This gearbox has high quality parts through out and required minimal effort to get it running flawlessly. $130 is more or less what it would cost to build a gearbox of similar quality so just save yourself the head ache and buy this one pre-assembled.
by Stan W. on 06/25/2023
"Gearbox and motor are easy to install. The Motor speed is amazing. Not specified but 40K motor I would say. Only downside is that the Dean connectors are soldered onto the wiring. You really cant feed it through the but stock without cutting them off and resolder.

Haven't checked the FPS yet but seems to be OK

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