On of the posters on the original article pointed out that you have to register one weapon on one form only but you could register all of your mags on one form... Which means if I had 1 AR-15 with 10 mags (which is certainly not unreasonable to me) I would only need two forms.
Now, I wouldn’t do it, like a lot of people, I’d rather bury them in the woods then let the government force me to do something unconstitutional, but there ya go.
They say that if it’s time to bury them, it’s time to dig them up.