I know next to nothing about guns and would like to know what set this gun apart from others. Thank you.
That basic concept isn’t new, but the way he did it made for a VERY simple and relatively inexpensive design that is remarkably reliable and abuse tolerant. The design can be used in a wide variety of situations from rifle rounds to shotgun shells.
It’s not the most accurate design, but it works for a lot of situations.
I will wait for the later posts positing that he wasn’t the original designer.