The Retro Arms Billet Version 2 Gearbox Shell is available in the U.S.A. under the EMG brand. You can order this from the Evike.com online store... "Unlike most other gearbox shells on the market, the Retro Arms CZ gearbox shells are precision CNC machined out of a solid block of billet EN AW 7075 T651 aluminum giving them unmatched durability and resilience.

Laylax is set to release a Prometheus EG Hard Gearbox v2 Shell that has been designed to make maintenance and teching easier for airsoft players worldwide. Ryan of Laylax explains what this gearbox shell has to offer... "Our NEW Prometheus EG Hard Gearbox v2 shell (6mm) with the simple goal of making your tech projects much much easier.

Latest product announcement from Gunfire is about the new Version 2 Gearbox Shell from Tornado... "Tornado's offer has just been enriched with something new! Durable v2 gearbox case made entirely from high quality aluminium by CNC machines. It has system of quick spring exchange and dedicated spring guide!"