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Laylax Prometheus Ver2 EG Hard Gearbox Shell for V2 Airsoft AEG Rifles (Model: 6mm)

ID: 14379 (GB-Laylax-EGHV2-6MM)
Prometheus / Laylax859188143791457144316759014379
4.0 stars, based on 3 reviews
Laylax Prometheus Ver2 EG Hard Gearbox Shell for V2 Airsoft AEG Rifles (Model: 6mm)
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Includes gearbox and spring guide only. Gears, bushings, wiring, trigger, and other internal parts sold separately.
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Prometheus / Laylax


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  • Split-panel design allows for easier tuning and maintenance
  • Gear changes and shimming have never been simpler or easier to perform
  • Quick-change steel ball bearing spring guide included
  • Access panel made from machined aluminum for strength and durability
  • Pre-radiused cuts at the front and back of the cylinder window
  • Wiring channels integrated onto the outside of the gearbox
  • Compatible with Ambidextrous Selectors
  • Great for any Ver2 compatible Airsoft AEG
The Laylax Prometheus Ver2 EG Hard Gearbox Shell answers the need for a gearbox shell that is easy to tune and allows for customization to meet the user's needs. Designed as a "split-panel" gearbox, Laylax integrated an access panel onto the lower section of the gearbox, making gear changes and shimming extremely simple and easy with no need to remove any of the compression parts or completely disassemble the gearbox. The top-side features a quick-change steel ball-bearing spring guide and another segmented access panel for the compression parts. The cylinder window has been pre-radiused front and back.

Wiring channels are located on the outside of the gearbox, keeping battery and trigger wires neatly segmented and away from any internal moving parts.

The gearbox panels are made from precision machined aluminum for a clean finish, strength, and durability. The main gearbox body is made from high strength cast zinc alloy. M3 steel screws are features all-around for extra strength.

Manufacturer: Prometheus (Laylax)


Compatibility: For Tokyo Marui Version 2 gearbox compatible Airsoft AEG rifles
Bearing / Bushing Size: Fits 6mm bearings / bushings
Material: Aluminum, zinc alloy

Note: Includes gearbox and spring guide only. Gears, bushings, wiring, and other internal parts sold separately.

About Prometheus / Laylax

Providing products in the Japanese market for the better part of 20 years, Laylax is well known for their high manufacturing quality and precise tolerances. Their tried and true parts and accessories have led them to be the leader in Japanese airsoft engineering.

3 Customer Reviews

(Write a review)

by Oliver H. on 05/29/2021
"I put this in my G&G Canadian C7 (basically an M16A1). I had to use my dremel tool to mill away some material at the back, bottom and left side so that it would fit into the receiver. Eventually it fit perfectly. This kind of fitment issue seems to be pretty common in airsoft for some reason. Everything else was *perfect.

It is easily the best Gearbox I have ever used. BUT, If you aren't handy with a dremel you may have issues getting it into some receivers.

I'd really like it if they made some V3's too.
by Per-Ivar F. on 08/13/2020
"dident fit my G&G Gr25 that use a V2 gearbox, to big in the front it seems. I even tried to modify my reciever but still dident fit.
BUT its easy to shim, looks good, and pretty nice with the split, good solution for the wire's aswell, BUT the ARL is a paint to put in
by James G. on 02/20/2021
"Did not fit my e&c 104 receiver
Guess I gotta find something to put this in or sell it

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