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CYMA Complete Metal Gearbox for MP5 Series Airsoft AEG

ID: 33080 (GB-CM03-MP5)
2.2 stars, based on 5 reviews
CYMA Complete Metal Gearbox for MP5 Series Airsoft AEG
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Gearbox shell may be in black or gray color as imaged depending on batch
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$65.00 $39.00

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.


  • Full metal gearbox
  • Version 2 gearbox design
  • Direct drop-in gearbox for JG, Echo1, CYMA style SMGs
  • Wired to the rear for full stocks
We have shopped the best OEM manufactures to obtain these newest version MP5 gearboxes factory direct. Recommended for the tech savvy, great value and great performance. Get your AEG a backup heart today!
(Not for MP5K / MP5-PDW Series)

Manufacturer: CYMA


Application: For ICS, CYMA, Tokyo Marui, Classic Army, SRC and other MP5 / Mod5 Series Airsoft AEG. Slight modification may be required for certain brands.
FPS: 350~420 FPS

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

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!

5 Customer Reviews

(Write a review)

by Eric S. on 02/23/2015
"Got this guy to replace the gearbox in an 11 year old tokyo marui mp5 R.A.S. The sector gear stripped five teeth one day in the middle of an intense firefight, so I was a little bummed and I came on to Evike to get a replacement gear for it. I found no shortage of parts, but the more I looked at that old gearbox, the more I realized it was just worn away - I could've bought the new gear for sixteen bucks and have it fixed and maybe have something else go in a few weeks, or I could just save myself the headache of breaking down that mp5 (seriously, it's time consuming to open all those mp5 clones up, there's no way around it) and start from the ground up with a brand new pre-assembled gearbox (also cheaper here than anywhere else that I found, AND you know you can trust evike.)

So far it's working wonderfully and I have zero complaints. The wires that run to the motor are a little stiff is all and can be tricky to hook up to the connection terminals, but it's an easy fix - just limber em up a bit, almost like stretching a muscle - don't go too far, but loosen em up a bit. I would open it up a bit when you get it just to make sure that it's properly shimmed and greased (IF you know what you're doing, if you've never fiddled with a box before, just do your research first!). Mine was perfect, but lemons are bound to happen at least once or twice - particularly with gearboxes, only because they can require tons of finesse at times.

Anyway, highly recommended for someone looking for a standard plug and play box that's affordable and dishes out a pretty capable performance.
by Finn O. on 03/26/2020
"The top portion of the gearbox snapped, everything else works but the shell is VERY low quality pot metal. Don't waste your money.
by Manny K. on 06/18/2019
"gearbox came broken so i just took out the needed gears and replaced the old ones. I shouldn't have to do that.

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