The burst-disc idea came from some thinkings in college today. The "bullet" case is just a flanged copper tube with foil glued to the flange, or some plastic held in place at one end, and for the other end there may not need to be a 2nd disc, but it would mean the ammo wouldn't roll out if it wasn't a super tight fit.
Picture:
Improvements/comments?
EDIT: Link to the concept of the shell/breech mechanism: http://www.maj.com/gallery/Infernal-Mav ... /shell.jpg








