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If you separate the two MOSFET halves and place them back together the unit will have to be reprogrammed using the EFCS control box before it can be used.
ARES - Amoeba Electronic Circuit Unit for M4 - Rear Wired is a replacement or upgrade circuit board for the ARES Amoeba EFCS gearbox system. This is the upgraded 'Blue' mosfet, designed to withstand higher voltage and amperage fluctuations allowing you to upgrade your rifle or modify it for a higher FPS. The Circuit comes complete with pre-soldered silver low-resistance wiring and with a TAMIYA connector. The set comes with the tappet plate giving you everything you need in the box to replace or upgrade your pre-existing EFCS gearbox. Perfect for those with an original generation Amoeba system who want to upgrade their weapon without frying their board.