Adds ammo to storage relative to travel distance. Upgrading grants ability cooldown buff while channeling ammo refill, allows reloading while invisible, and removes speed penalty for running while reloading.

• Effect 1
  For every 400m traveled, Heartbreaker receives +1 ammo in ammo storage.
• Effect 2
  Channeling ammo refill speeds up ability cooldown by 20%.
• Effect 3
  Reloading doesn't break invisibility.