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

The plunger mod improves semi-auto shooting performance by ensuring that the plunger returns to the closed position as quickly as possible between shots. This, in turn, keeps BB placement consistent within the bucking by avoiding issues related to precompression.

If you intend on using an R-Hop, REAP, or Flat Hop system then this mod is necessary to get the most out of your gun.

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