Hi,
I'm the writor of the post on france-airsoft about the wiitech hop up (so sorry for my english, I'm french ^^).
so the wiitech hop up chamber is very good. It's improve my FPS (from 330fps to 340fps with stock ressort and Tanio koba 363mm and Translucide Guarder bucking, but stock rubber).
The wiitech nozzle is longer than the stock part (about 1mm).
But the stock rubber isn't powerfull to pull up the 0.25g bb, so I order a blue madbull, normaly I receive it this week, I will give you my feedback.
some picture of my post :
if someone have any solution to improve
