ThinkFun Fire Spring set

This is a set very useful that allows you to create machines that shoot objects mechanically thanks to one trigger
Obviously you have to combine this prices with others to obtein very powerful shooting machine, the only limit is only your imagination!

All pieces of my design can enter in an area of 10x10x12.5cm

PIECES THAT YOU NEED:

(pieces invented by me)

Q(1 pieces)
P(1 pieces)
R (molla piccola) (1 pieces)
S (molla grande) (1 pieces)