Laylax Prometheus Ver2 EG Hard Gearbox Shell for V2 Airsoft AEG Rifles

When it comes to Airsoft gearbox engineering, few names inspire more trust and respect than Laylax Prometheus. Known for their world-class internal upgrades and uncompromising craftsmanship, Laylax brings you the Prometheus Ver.2 EG Hard Gearbox Shell (8mm) — a complete reimagining of the traditional AEG gearbox. This innovative design delivers the perfect blend of strength, precision, and user-friendly maintenance, making it the go-to choice for serious Airsoft technicians and performance builders.

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Split-Panel Design for Effortless Maintenance

At the heart of this gearbox is its revolutionary split-panel design, a game-changer in AEG tuning and servicing. Traditional gearboxes often require complete disassembly just to access the gears or adjust shimming — not so with the Prometheus Ver.2 EG.

Laylax’s design features an integrated lower access panel that allows quick and easy gear adjustments without removing the compression components or completely tearing down your gearbox. This means you can perform gear changes, shimming, and inspections in a fraction of the time.

The upper section includes a segmented panel for compression parts, allowing even easier tuning and maintenance. For Airsoft techs who regularly fine-tune builds, this design saves time, reduces stress, and improves long-term performance consistency.

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Durability Meets Japanese Engineering Precision

Every component of the Prometheus Ver.2 EG Hard Gearbox is crafted for maximum strength and reliability. The main body is constructed from high-strength cast zinc alloy, providing robust structural support capable of handling the rigors of long-term use.

Critical sections such as the access panel are made from precision-machined aluminum, adding additional strength and ensuring smooth operation under pressure. Laylax has reinforced every detail, from the M3 steel screws used throughout to the pre-radiused cuts at the front and back of the cylinder window, which help distribute impact forces and prevent cracking over time.

This gearbox isn’t just strong — it’s proven. Laylax has tested the Ver.2 EG Hard Gearbox for over 100,000 rounds at Japanese FPS limits (330–340 FPS, MS100 spring), guaranteeing unmatched longevity and dependability in standard and tuned AEG setups alike.

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Quick-Change Spring System and Optimized Wiring Channels

Another standout feature of the Prometheus EG gearbox is its Quick-Change Steel Ball Bearing Spring Guide. This allows users to swap or adjust springs quickly and easily without full disassembly — ideal for adapting between indoor CQB and outdoor field limits.

Additionally, external wiring channels are integrated directly onto the gearbox shell. This thoughtful design keeps wires neatly organized and prevents contact with moving parts, reducing the risk of shorts or internal damage during operation.

Whether you’re running standard wiring or advanced MOSFET configurations, this design ensures your internals stay clean, efficient, and secure.

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Designed for Compatibility and Customization

The Laylax Prometheus Ver.2 EG Hard Gearbox Shell is compatible with most Version 2 AEG platforms, including M4, M16, and other similar rifles. It also supports ambidextrous selector systems, making it a great fit for modernized builds.

Because Laylax understands that every Airsoft tech has different goals, the gearbox comes as a bare shell — giving you the freedom to pair it with your preferred gears, bushings, and wiring setup. Whether you’re building a high-speed CQB rifle or a DMR tuned for precision and range, this shell provides a rock-solid foundation for your next high-performance build.

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Specifications:

• Manufacturer: Prometheus (Laylax)

• Material: High-Strength Cast Zinc Alloy with Aluminum Access Panel

• Compatibility: Version 2 Airsoft AEG Rifles (M4, M16, and similar platforms)

• Bearing Size: 8mm

• Design: Split-Panel for Easy Access and Maintenance

• Spring Guide: Quick-Change Steel Ball Bearing Type

• Additional Features: Pre-Radiused Cylinder Windows, External Wiring Channels, Ambidextrous Selector Support

• Testing Standard: 100,000+ rounds at 330–340 FPS

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Why Choose the Laylax Prometheus EG Gearbox?

✅ Innovative split-panel design for fast, simple maintenance
✅ High-strength materials engineered for long-term durability
✅ Quick-change spring system for flexible tuning
✅ Precision machining and Japanese reliability
✅ Compatible with ambidextrous selector setups
✅ Proven to withstand 100,000+ rounds of consistent performance

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About Prometheus (Laylax)

Laylax Prometheus is a premier Japanese manufacturer of high-end Airsoft upgrades, known for its relentless pursuit of precision and performance. With decades of innovation, Prometheus has earned global respect for producing the most reliable, tournament-grade Airsoft internals in the industry.

Each Prometheus component — from barrels to gearboxes — is built with true Japanese craftsmanship, ensuring every shot is powered by consistency, efficiency, and excellence.