Gearbox Parts

A HPA ready drop-in engine by Ares pre-built for AR15/M4 AEGs. Suited for Version 2 spec gearbox shell that use a single sided fire selector. Con...

A sector gear from ARES, the same gear that can be found in the EFCS (Electronic Firing Control System) Gearbox from ARES. Includes the magnet nee...