Pneumatic projectile launching system

1. A pneumatic valve mechanism configured for a projectile launching system comprising: a volume chamber; a valve positioned within the volume chamber, the valve moveable between an exhaust position wherein flow through from the volume chamber through the valve is facilitated while flow into the volume chamber from a fill port is prevented and a filling position wherein flow through from the volume chamber through the valve is prevented while flow into the volume chamber from the fill port is facilitated, the valve being biased to the exhaust position; a sear which retains the valve in the filling position and releases the valve into the exhaust position when actuated;

and wherein a secondary sear catches the valve as it moves into the filling position if the sear is currently actuated, then releases the valve onto the sear when the sear is no longer actuated.

2. The pneumatic valve mechanism of claim 1 further comprising: a body defining a continuous bore from a substantially open forward end of the body to a substantially closed rearward end of the body; the valve mechanism of claim 1 : a nozzle positioned within the bore adjacent the forward end of the body, the nozzle moveable between a rearward position wherein the nozzle facilitates passage of a projectile through 4 projectile port and a forward position wherein a projectile is fired and nozzle blocks the projectile port to prevent passage of an additional projectile therethrough; a rear acting area of the nozzle in fluid communication with the volume chamber; a forward acting area of the nozzle onto which a constant rearward biasing force is applied;

an interface between the nozzle and the valve mechanism which applies a force to the valve in the direction of the filling position during a section of the rearward travel of the nozzle.

3. The pneumatic valve mechanism of claim 2 wherein fluid flow into the volume chamber is controlled by the position of the sear and not by the position of the valve.