Complete V2 gearbox for M4/M16

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 skeleton has been adapted to install 8mm bearings, and thanks to the reinforced structure, it is possible to 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. The kit includes a full gearbox including wiring in the rear.