● New version for Standard AEG Ver.2 Compatible Gearbox!! This reinforced Prometheus EG Hard Gearbox Shell Ver.2 (8mm)gearbox is designed based on the Standard AEG Ver.2 gearbox, with a complete overhaul of the structure and materials to enhance performance and durability.
 
● High Maintenance Ease with Half-Split Structure! The gearbox features a half-split design where only the right side is split vertically. This allows for separate assembly of the drive system and air compression sections, reducing the risk of misalignment when closing the gearbox. Unlike a fully split structure, it simplifies gear engagement, piston, and tappet plate positioning, improving overall maintenance efficiency.
 
● Significantly Reduced Wiring Damage with External Wiring! To prevent pinion gear damage to the wiring, the design routes the wiring externally along the gearbox.
 
● High-Strength Material with Over 100,000 Rounds Tested! Made from high-strength materials, the gearbox's internal components, which endure significant friction, are coated with a smooth Teflon finish. This design has passed a durability test of over 100,000 rounds (based on our standards) and can handle standard setups as well as high-stress configurations like high-cycle settings.
 
● Spring Replacement without Gearbox Disassembly. Thanks to the easy access spring guide system, you can replace the spring without disassembling the gearbox. The dedicated spring guide features a thrust bearing to reduce resistance during spring compression. The contact surface of the guide is made from a self-lubricating, wear-resistant rotating tornado shaft material. This double-smooth effect minimizes resistance and stress, maximizing spring performance.
 
Set Includes:
EG Hard Gear Frame Body
Dedicated Spring Guide
Hex Socket Countersunk Screw (M3×16) ×3
Hex Socket Countersunk Screw (M3×8) ×6
Grip Fixing Screws ×4
Switching Unit Fixing Screw ×1
Cutoff Lever Fixing Screw ×1
 
Specifications:
8mm Bearing Diameter
Please use our "Sintered Alloy Metal Bearing 8mm" or "Multi-Fit 8mm Bearing" for the bearings. Using bearings from other manufacturers may cause malfunctions.
 
Compatible Models:
Standard AEG Ver.2 Gearbox 8mm Bearing Type
Note: This product is designed based on the Ver.2 gearbox shape, but it is not a perfect replacement. It is intended for advanced customizers and custom shops, and some modification may be required depending on the model. In some cases, it may not be compatible.
Please use an 8mm-compatible selector plate. Tokyo Marui genuine selector plates, Hard Selector Plate NEO, and Hard Selector Plate M16 Series are not compatible.
 
Caution:
Ensure the spring guide is parallel to the gearbox before test-firing or assembly.
The images provided are samples (prototypes) and may differ from the actual product in color and specifications.
The product does not include the airsoft gun or any other parts.
This item is intended for advanced users and custom shops.
After customization, always check the Joule value and muzzle velocity. Exceeding the legal limit of 0.989 Joules due to the Firearms and Swords Control Law amendment will result in penalties! Measured values may vary due to factors like the season, time of day, hop adjustment, and gun characteristics, so use your airsoft gun with a safe margin below the legal limit!