This is an idiotic feel-good bill being pushed by political opportunists who want to look like they're taking action against a flood of illicit plastic guns. In a sane world, it would be shut down before anyone even wasted the time to print it.
WE DO NOT LIVE IN THAT WORLD.
I don't even think plastic guns are very viable as it is, they're pretty shitty guns and this is pretty much a nerd hobby currently.