Complete, reinforced gearbox in V2 version dedicated to M4/M16 replicas. It is an ideal solution for those who want to buy a good gearbox at a reasonable price.

The Gearbox has been adapted to mount 8mm bearings, and thanks to reinforced structure, it can use stronger springs for mechanical tuning. Inside you will find among others: steel gears, steel spring guide, m120 spring, lightweight polymer piston with steel teeth, and sealed cylinder head with polymer nozzle.

Kit includes full gearbox including front end wiring.