
All I did was epoxy a barrel made of SCH80 PVC and 17/32 Brass direcetly to the plunger tube. I then cut off the extra parts of the shell, and took a small piece of it and epoxied it to the bottom of the barrel for cosmetic reasons.

The result is a single shot maverick that gets 30-40 foot range firing stefans.
It's not very practical, and I will probably never use this gun in a war, but it was an interesting experiment anyway.
Here's another pic:








