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King Arms Helical Gear Sets for Tokyo Marui Spec Airsoft AEG Gearboxes (Type: 100:300 Normal Torque)

ID: 12399 (Gears-KA-02-02)
King Arms Helical Gear Sets for Tokyo Marui Spec Airsoft AEG Gearboxes (Type: 100:300 Normal Torque)
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King Arms / Eagle Force



  • Heavy duty steel gears
  • Heat treated for improved strength and durability
  • Compatible with most gearboxes
  • Precision CNC machined construction

Manufacturer: King Arms


Compatibility: Most Standard Tokyo Marui Spec Airsoft AEG Gearboxes (M4, AK, MP5, G36, P90, and Other Compatible Models)
Gear Ratio: 100:300 Normal Torque
Material: CNC Machined Steel

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

About King Arms / Eagle Force

King Arms was founded in 2004 with the mission to ensure optimum customer satisfaction by providing precision products and outstanding service. In 2015, we moved our headquarters from Hong Kong to Taiwan where we've continued to provide excellent products with the highest quality. While working with leading firearms manufactures, we provide to our customers a level of innovation and authenticity that can't be found anywhere else in the Airsoft industry. This goal is what continuously drives us to improve and gives us purpose.

1 Customer Review

(Write a review)

by Omar B. on 12/22/2023
"I dont think Im that bad at shimming gears, but for some reason no matter how I tried, even after a near perfect shim of the bevel to pinion with the pistol grip. I was careful to shim all of them closely, you know cuz the helical design. My first installation they sounded ok, but still had a bit of pinion/bevel screech but still a fabulous response and medium-slow rof i was looking for. So I tried again paying more close attention to bevel/pinion relations and it ended up screeching so bad and the motor gets hot enough to overheat and blow the fuse after a few test shots. In conjunction with the expensive king arms cnc pinion it just never sounded right and it ended up chewing up the pinion even more and I just dont feel like using this combination anymore. I got it in the first place to reduce my rof in a vfc m27. My best sounding aeg is an m4 using g&g cm16 gears so i may just source another 2nd hand set to put in my m27.

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