WE Thompson NPAS problems

[Game Cam]

Hey guys/girls,

I am having issues getting a NPAS kit to work in my WE Thompson.

When I put it in and turned the FPS up the max it got was 156fps and when I turned it down the minimum was 56fps (Nuprol Green Gas).

Without the NPAS it was shooting 360 with Nuprol Green Gas.

I got the NPAS to make it so I can consitently pass chrono at sites and so I can adapt the FPS when I go abroad.

If anyone know what I am doing wrong let me know.

 

[Wo1f]

Did you put it in the correct way? And is it seated on the spring properly? If you any get it to work, use a LFS restricter disc instead