ya, an angel could do it. any blow back could do that as well. but it means a whole new bolt design. im sorry im really thinking about how to make this work with no idea on if you ever intend on trying or if its just an idea for this contest lol. if you do intend on trying to do this one day, let me know and we could talk about how to make it work.
but about the video, only thing i didnt like was that it looks like you spelled "SO" instead of "50". you established a problem/need and a solution, the basics of any product. i would add in how many cases a tourny player shoots at a competition and show the savings between .68 and .50 because thats really what you are selling here, a money saver. show how effective your money saver is.