I have built a spring pistol completely out of scratch. It has a 1" diameter plunger tube. I used a peice of an arrow from a real bow and arrow as the plunger shaft. At the head of the plunger shaft, there is a paice of half inch cpvc. Then, I wrapped some masking tape until the oring that I got fit around it and made an almost perfect seal. Here is a pic.
The gun uses Carbon's trigger since it was the only parts I had lying around. I say the gun turned out well. I realized that if I actually spend time on some of my projects they turn out better. Here is some pics.
I upgraded it a little with some bushings.
FHG stands for "First Homemade Gun"
