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JG Complete 8mm Ver. 2 Gearbox for M4/M16 Series Airsoft AEG - Rear Wired

ID: 30141 (GB-8mm-M4-B)
MA001 rear no motor
CYMA859188301412MA001 rear no motor30141
4.3 stars, based on 21 reviews
JG Complete 8mm Ver. 2  Gearbox for M4/M16 Series Airsoft AEG - Rear Wired
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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.

Complete 8mm Ver. 2 Gearbox for M4/M16 Series Airsoft AEG - Rear Wired


  • Wired to the rear
  • 8mm metal bushings
  • Ball bearing metal piston guide
  • Reinforced gearbox shell
  • Low resistance wiring
  • Reinforced JG gearset
  • 370~460 estimated FPS
Connector Type: Small Tamiya
Compatibility: Most Version 2 Airsoft AEGs
Material: Metal alloy, Low resistance wiring

Manufacturer: JG

About CYMA

CYMA is among the oldest, most experienced and the largest Airsoft manufacturing facility in the world. Known for their unmatched quality control and professionalism, CYMA is selected to be the OEM of a vast amount of Airsoft products. Durability and performance meets affordability!

21 Customer Reviews

(Write a review)

by Richard B. on 03/14/2016
"Got this gear box In today! Pretty solid gearbox. I picked it up for my short m4 so I can use it more on the fields. Seems to hit hard, I would say the fps is around the same as my Kwa sr10 (about 400). That's just judging from the speed of the bbs won't know the true fps till I take it out on the field. Great gear box, the only issue I ran into was it didn't fit in the metal body at first had to do some moding to the body and gear box to get it in. I'll make sure to put my fps reading in on the comment section soon.
by Nick S. on 03/10/2016
When the gearbox in my m16a4 ended up being a lemon, I was sorely disappointed. I now had a hundred-sixty dollar display gun, that is, until I discovered Evike. I found this gearbox and I was certain that it would be a great replacement. I couldn't have been more right. It is rear wired, with a CYMA-style fuse box that accepts 20 or 19mm fuses, which helps to protect your gearbox. It fit my rifle perfectly, and while the wiring is a bit short for a full-stock m16 rifle, it is easy to connect the battery nonetheless. For me, it is loud, mean, and effective. If you have an AR platform AEG that needs a gearbox or even an upgrade, please consider the JG Complete 8mm Ver.2 gearbox!

It comes with a motor along with the gearbox
Please remember to have spare 20 or 19mm fuses in case

Metal construction
Decent FPS
Rear wired so you can keep the aesthetic appeal of your AR!

I haven't had any yet!

Thank you so much, Evike!
by Caleb W. on 04/28/2015
"Best Gearbox for the price! Shot faster than a friend's $300 upgraded gun!

Very powerful
Shoots far
Shoots fast
Full Metal
Lipo Ready

Spring so powerful my 9.6 butterfly couldn't pull the spring.
(had to get a lipo anyways)

Notes: At first this gearbox did not fit in my elite force cqb if that's the problem do some shavings on the inside of you lower receiver. If you have trouble just take it to your local shop or field. I run an 11.1 lipo in this and it works great! Happy Airsofting!

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