I find it notable that you chose the forum devoted to one-shot magazines for your first post.
I have a technical question. Wouldn't a one-shot magazine make the rifle a double-shot?
Only to a persnickety troublemaker😛.
The official technical designation (which I just made up), is unified-chamber-magazine. Also be advised that the official comment period (which I also just made up) for my previous post has expired.