Good tuning spring

Since I've only possessed "gray trigger" version myself for choosing to incorporate this into the tuning spring Blaster.
For children, the conversion is, however, quite difficult. The Blaster must be screwed (Warning a screw is hidden), replaced the spring and are then screwed back together first. During assembly care must be taken that all parts are in the right place. Otherwise, it may happen that the blaster does not work properly.

Advantage:
Extreme performance

Disadvantage:
Arrows wear faster (factor 2)
Arrows no longer whistle

Neutral:
There is more force required to stretch the weapon (is logical)