Mission Possible/Hydraulics

=Closed System Hydraulics=

Windshield Fluid Pump
This is basically what was used in Dark Sabre's 2005 MPC. The end results will probably look something like this: As you can see, there is a pump, a small reservoir, a syringe, and a switch.

Double Ended Syringe
This is one of the really simple options and was used in a number of the top ten devices at the 2010 nationals. You simply connect two syringes together and the force applied to one plunger pushes the other out. It is less complex than using a pump, but it necessitates another mechanical step, which is more likely to be a point of failure, so test thoroughly.