This is my latest spudgun technology advance.  This new construction will allow multiple projectiles to be fed into the breech without having to manually reload.  So in other words, the trigger is pulled, a projectile is fired and immediately reloaded. 

The is process is somewhat complicated considering that I have not drawn a 3D model yet.

 Air is charged into the chamber.  The valve is released.  The projectile is pushed through the barrel.  As the air is pushing the projectile out the barrel,  some air flows down through the elbow which causes a small piston to slide back.  The end of the piston is attached to a second barrel inside the barrel casing.  As the piston moves back form the air, the secondary inner barrel moves backward and a small opening is created for a few seconds in which a projectile drops down.  As soon as the projectile is in place, a spring slides the inner barrel back over the forward barrel and another shot can be fired.

Further and detailed explanations of this device will soon follow...