With the caps on, the tubes fit very well inside 1" sch40 PVC. I've been trying to come up with ideas for what to do with them. So far all I thought of was to put a rolled up note inside and blast it over to a neighbor's house. The note would read "keep your f*cking kids off my lawn!"

But the best part is that with the caps off, the tubes themselves fit very tightly inside a 1/2" socket.
I'm brainstorming ideas right now for a simple, compact "shotgun" that would make use of these shells or sabots... whatever you want to call them. I was thinking that I could replace what would be a barrel with a 1/2" coupling and simply plug preloaded shells in and fire. They fit tightly enough that they shouldn't fly out during firing, and the length of the tube should accomodate a good number of airsoft bb's plus cotton wadding at each end.
It would easy to prepare the shells and even easier to load them. If I can come up with a launcher small enough, I might even share this on some of the airsoft forums I go on. They might like something like this.
