I was bored one day so I decided to make a gun to shoot my brothers with. I needed a projectile that was soft, readily available and inexpensive. The answer: marshmallows! A marshmallow gun is usually very simple: a tube that you put a marshmallow in. You blow in one end and the marshmallow flies out the other. I wanted to make something more complex. I got a one-way air valve, some PVC fittings and a ball valve and created...(drum roll)...the pump-action marshmallow gun!
This is my first instructable so feel free to leave comments and tips.
Step 1: Materials
4 1/2" PVC 90 degree joints
1 1/2" PVC coupling
1 1/2" PVC ball valve
(I think you have discovered by now that all the PVC components are 1/2".)
1 PVC tee
1 PVC one-way valve (Look for it under the name "check valve")
1 PVC end cap
Assorted lengths of PVC pipe (1/2", of course)
Dowel that will fit into the pipe
Step 2: Assemble the Stock
The stock is made of all four angle joints and the coupling. Fit all the pieces together but don't cement then yet. We will need to adjust this later. The picture probably explains better that I could put into words. After all, a picture is worth a thousand words.
(The stock also doubles as an air tank.)
Step 3: Assemble the Barrel
Now we come to the barrel. For the barrel, take the ball valve and cut a short length of PVC to connect the valve to the coupling of the stock. Cut another short length of PVC to connect the other side of the valve to the tee. On the other side of the tee, put a long piece of PVC. This is the actual barrel. Make sure you get it to the right length for you.
Again, don't cement the pieces together! (I made that mistake.)
Note: I attached a short bit of wood to my ball valve to make it easier to turn. That is what the long wood thing is in the picture.