This mod is done to the hopup chamber. Do not order this service by itself!

Plunger spring mod aims to improve performance for rHopped or Reap hopup barrel groups.

It prevents common pre-compression issues which can affect BB placement inside the hopup chamber.

You will need to use flat hopup bucking or Reap hopup bucking to work with this mod.

Plunger Spring Mod

The plunger spring mod aims to improve performance for rHopped barrel groups.
It prevents squibs which can affect BB placement inside the barrel and hopup chamber by resetting the plunger before the bolt returns to the battery.
It is recommended to pair a flat hop bucking with this mod.
Installation Guide:
https://daytona-airsoft-support.gorgias.help/en-US/plunger-spring-mod-(required-for-rhop-mod)-23252
Shooting Video:
https://www.youtube.com/watch?v=sjRgVXscaV4