ZCI V2 M4 Upgraded Gearbox With MOSFET (Various Connectors)

ZCI V2 M4 Upgraded Gearbox With MOSFET An upgraded Version 2 gearbox by ZCI fitted with an M4 trigger and selector plate. This is built with 8mm bearings, a quick-detach spring system, blade trigger and a trigger board microswitch MOSFET. Due to the type of MOSFET, it doesn't have a cut off lever and is controlled electronically. Features: Metal gearbox shell Quick change spring 8mm bearings Electronic trigger unit Blade trigger Full bore cylinder