Umarex ECS Complete Gearbox V2 Gen 2 MOSFET

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  • Regular price $144.99
  • 2 available


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Replacement gearbox for VFC M4/M16 and other AEGs with a V2 gearbox. This high quality Version 2 gearbox comes fully built and ready to drop-in your favorite AEG, and features an Inline Wired MOSFET and Blade Fuse. The integrated Quick Change Spring System makes it simple and easy to upgrade or replace the spring mechanism within this gearbox.



  • Standard version 2 gearbox design
  • Rear wired
  • Reinforced polymer internal components
  • Inline wired MOSFET
  • Match grade internals
  • Quick change spring guide


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