The Ares Mechanical Harden Steel Gear with Magnet (MHG‑013) is a reinforced internal gearbox component designed for use in select ARES Airsoft AEG gearboxes, particularly those that incorporate magnet‑sensing electronic fire control systems (EFCS). Its hardened steel construction and integrated magnet make it a reliable replacement or maintenance part for players maintaining or servicing Ares EFCS‑equipped rifles.
 
Product Overview
This gear is crafted from mechanically hardened steel, giving it better wear resistance and strength compared with softer stock gears — ideal for standard play and routine gearbox rebuilds. The integrated magnet is specifically included to support magnet‑based cycle detection in ARES electronic trigger systems, helping the EFCS recognize the sector gear’s position during firing cycles.
 
Key Features
Hardened Steel Construction: Made from high‑strength steel for improved durability and longevity in gearbox applications, reducing the risk of gear tooth wear under normal airsoft use. 
Integrated Magnet: Built‑in magnet allows compatibility with ARES EFCS gearboxes that use magnet detection to sense gear position for electronic firing control.
OEM‑Style Replacement: Designed to match the fit and basic function of original ARES geared components, making installation straightforward in compatible setups.
Metal Gear Material: Full metal construction helps sustain regular skirmish stresses better than some stock plastic or weak alloy gears.