I am going to try my hand at building fast gun cannons. I found a couple of threads on big gun constructions. does anybody have a thread they can point me to for designs and construction? I have a solid understanding of how the old fashioned copper guns work but was interested in a new design but certainly not a requirement. I was intrigued by something with PVC or Styrene. The second question, if I have to build the older style copper gun, does anybody know where to get the more specialty parts for it. I.e the little “T” plunger in the bottom and the spring.