EDIT: Pure eXTCy confused me
Then I recommend buying Freak barrel kit full or jr kit.
After that you may want to take a look at a new bolt, like TechT or Firebolt, maybe Violent Series trigger may be something as well. Personally I don't like the stock trigger so trigger from VS may be first priority before new bolt.
OR maybe a QEV to be able to lower the dwell and shoot more balls on a tank then usual.