Photo update! Custom SR25/L129A1 Sharpshooter Polarstar!

[M_P]

I think so Ian, they sell different nozzles for different FPS' so I'd imagine they're not standard

 

[Unrustle_Thine_Jimmies]

I wouldn't give up on it so soon. Check out some yank forums where a lot of Polarstar techies hide. Some guys like 'SilentObvervant' from reddit are really knowledgeable,as is Bingo from Bingo airsoft works. AirsoftMechanics is also a great place to discuss those kinds of issues. There could be a myriad of issues and might be easy to fix. Could be nozzle alignment issues or it could be that the Fusion engine itself is not releasing the same amount of air all the time due to an issue with the poppet valve or something.