OK I could not wait so I called my local academy sports and I got the Persuader model.

I liked the JIC but I figured I could make the waterproof tube with some 6" PVC, a cap, and a (I cant remember what the heck the thing is called, it has the rubber stop that expands... you know what the heck it is don't give me that look)

I will be making a few of those tubes and burying them so that if I need to I can have some guns available.

Mike