Reinforced gearbox v2 - M4 / M16

- reinforced gearbox shell with steel ball bearings 8mm

- reinforced spring guide with bearings

- steel gears

- spring 120m/s

- reinforced piston

- reinforced directional piston head

- reinforced brass cylinder head

- cylinder type 1

Condition: New

Possibility to configure the gearbox:

- Change the wiring side

- Change of wiring to low-resistance

- Plug change

- Cylinder change

- Changing the spring