Unlocks your weapon's hidden element. Also increases bowgun loading capacity. (There is a cap to loading capacity.)
Free Elem/Ammo Up I
Draws out 33% of hidden element and expands clip size for some ammo.
Free Elem/Ammo Up II
Draws out 66% of hidden element and expands clip size for some ammo.
Free Elem/Ammo Up III
Draws out 100% of hidden element and expands clip size for some ammo.