Nuprol 4.0 (Black Gas) 0c - 10c
Nuprol 3.0 (Red Gas) 10c-20c maybe even up to 22c (Abbey Ultra is fine too)
Nuprol 2.0 22c plus (Abbey Green)
30c plus > beach with beer sod airsoft
IMHO, HPA in a MWS? why, why why? You may aswell get a Wolverine or Tippy?