I made it so that I could fight my friends in air soft gun skirmishes. The gun can shoot bbs for about 1.5 seconds after pumping it 20 times, but I only need to pump it several times to load it sufficiently.
Pump System
The gun can be easily pumped up while running so it can be ready to blast the next person around a corner. The Pump is a regular sports pump attached to a 2-way hose splitter with ball valves to regulate flow. After I pump up the pop bottle, the valve that leads to the pump is closed. (yes there are some small leaks). then the valve to the blowgun is opened and it is ready to fire. I epoxied the hose to the 1/2 inch pipe and attached the pipe to the 1/2 inch threaded fitting.
The Gun Itself
The gun i made a while ago but since I dont have a compressor
I I had to use a shitty 2 inch pipe as an air reservoir which took a while to pump up. So I kind of abandoned the gun for a while until this Idea took shape. There is a half hole vortex block made of wood in a 1.5 inch pipe. the plunger is a spring from a broken sprinkler (I Found) at my school
Overall, the gun is pretty well made except the duct tape parts which I plan to glue on later and the un-pressure rated hose, which is probably ok to do the job because of such low pressures that I pump it up to.
