Anyways, I think I found the perfect gun for me...
![Image](http://www.geocities.com/leprechaun71588/Guns/WaterGunV4.jpg)
It is lightweight, affordable and easy to build, looks very good for a homemade, and requires no pumping at all. Basically, you just put the bottom of the handle up to the hose nozzle (the one we have fits right into the 1/2" PVC), and it fills up the balloon. You turn the ball valve to fire. Right now I've got about 25-27 7" balloons on there and I'm getting about 17 feet of range with my smallest nozzle, not too great yet. I just used a 2-liter bottle for the CPS casing, I cut it and half and stuck it back together so I could get all the stuff in there easier, so it only holds about 1.5 liters now.
I was just wondering...how many more balloons should I add, and how good of range do you think it is capable of? I think if I add more balloons, I'm going to need to glue all the pieces together, something I don't normally care to do. Every once in awhile, the back will blow off and spray water everywhere now, so I know more balloons will definitely do that all the time.
Before you say anything, I'd like to make it clear that I don't plan on going out and spending more than $10 extra on the gun. If I could get 30+ feet with it, I would be happy. I'm not terribly worried about getting godly range, but I think 17 feet is looking a little sad.