Everybody has their first cannon, right? Well, here's mine. "Doubting Nick" wished to see photos, so here they are. It's not quite complete, but it was far enough along to test. Works fine, no doubles as far as I can tell. Has a little trouble feeding but I think I know how to fix it. Shiny! This cannon doesn't utilize a piston like most cannons do. This style of interrupter is explained here: MWU:OFFENSE-101 'The Geek Breech Cannon' | R/C Warship Combat Schrader valve for testing on the air compresser. Enjoy!!!