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Cyma Version 3 Gearbox and Motor Set w/ ETU for SMG-9 & MP5K AEG Airsoft Submachine Gun

ID: 97284 (GB-CYMA-CM13A)
Cyma Version 3 Gearbox and Motor Set w/ ETU for SMG-9 & MP5K AEG Airsoft Submachine Gun
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$119.00 $95.20

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.


  • Reinforced metal gearbox
  • Includes Electronic Trigger Unit
  • Built to take LiPo batteries for increased performance including rate of fire and trigger response
  • Quick-change spring system for easy FPS swaps
  • Factory direct OEM replacement part

Manufacturer: CYMA


Connector Type: Standard Deans (Wired to the front)
Bearing Diameter: 8mm
. Compatibility: CYMA Platinum SMG9 and Umarex MP5k Series Airsoft Electric Submachine Gun and other similar airsoft AEGs. WILL NOT FIT a4/a5 style MP5s.

Disclaimer: Professional installation highly recommended. Please use discretion when installing custom parts as fit and compatibility may vary. Modification may be required. Professional installation recommended.

Complete Gearbox Disclaimer:
We have compiled a series of videos for AEG take down, assembly and gearboxes for your reference. Recommended for experienced players only. A "gearbox" virtually never breaks, offers spare parts for all components. All gearboxes are sold as a complete set of parts and "AS IS". All gearboxes are directly from their respective manufactures. Buyers are 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!

1 Customer Review

(Write a review)

by James F. on 03/16/2024
"Fits great in the EF MP5k, just make sure the wires are tucked in properly and there should be issues.

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