[Hectic]

Well with the npas you likely wont be able to raise the fps beyond what it shoots at maximum anyhow (maybe by a little but not much) so if you wajt upgrades buy ratech steel bolt npas inner barrel and hop rubber. Then putbhigh flow valves in the mags and steel parts in the trigger assembly not much you can do beyond that and raising the fps from 300-400 ismt gonna maie much of a difference in performance a good barrel and hop up will kake the most improvement.