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SKU: 4571443167590

Prometheus EG Hard Gearbox Shell Ver.2

EG Hard Gearbox Shell Ver.2  (6mm)

Complete redesign of the classic version 2 gearbox for AEGs. The EG Hard Gearbox Shell has been designed from the ground up to solve many of the issues of past designs.

  • New split panel design to make maintenance and custom builds much easier!
  • Quick change spring system and included ball bearing spring guide.
  • CNC Aluminum lower panel for the gearset.
  • Upper panel for the compression unit.
  • Shimming is now faster and easier.
  • Labeled shell for quick reference of screw size and part orientation. 
  • Pre-radiused front and rear.
  • Overlapping panels to keep your parts from shifting, and maximizing your shimming.
  • External wiring, no more pinion gear issues!
  • High strength, reinforced main shell passed our 100,000 round test under heavy loads.
  • Interior shell is Teflon coated for  easier operation of your gears and compression parts.
  • The top portion of the gearbox is now a single piece vastly increasing the strength of the top of the gearbox where most version 2 gearboxes often crack.


  • EG Hard Gearbox Shell
  • EG Hard Gearbox Shell Ball Bearing Quick Change Spring Guide
  • Handgrip Screws x4

Model Type:

  • 6mm


  • Tokyo Marui Standard Ver.2 AEGs
  • Tokyo Marui Specification Ver.2 AEGs