Well, they don't want much this time, do they??
Seems to me that a solid block of steel, aluminum alloy, polymer etc., meets their definition. Stretch it just a little and I think unrefined ore in the ground could be covered as well.
There are two important parts here, needful of consideration. The first is something that is NOT a firearm under the law, being regulated/restricted/banned because it
could be made into a firearm.
Note that, since the item is not a firearm, we don't have a 2nd Amendment right to ownership. It falls under the much more general right to "property" which is, and has been subject to government control and regulation throughout the history of mankind.
Courts can legally refuse to hear any challenge based on 2nd Amendment grounds, and I'm confident they would do just that if such a case came before them.
There is nothing that cannot be "completed by the consumer". Even starting from the base raw materials, the "consumer" can manufacture anything desired, what varies is the amount of time, effort, and expense involved.
Pathan "gunsmiths" have been converting ripped up railroad track into functional firearms, using only hand tools, muscle power and a lot of determination, since the British were first kind enough to provide the steel by laying railroad track for them to steal...
The next thing to carefully consider is the change in direction. The proposed law is using Consumer Product Safety law for gun control.
I suppose its "for the children" because the section named in the quoted material is part of the child safety regulations, the ones that cover what chemicals can't be in a baby bottle, and such things.
SO, (potentially) under this bill, an unfinished two pound block of steel (or plastic, or...) could be a banned "hazardous product" using child safety laws.
Next item, "Assault Weapon Parts Kit".,. What is that???
That could be any, and every part for every semi auto firearm (other than the frame), ever.
Need a new recoil spring for your Glock or 1911A1, or Ruger .22? sorry, banned now, because its a semiautomatic assault weapon part...
Think its not happening? Think again. A recently passed law in Washington defines every semiautomatic firearm as a "semiautomatic assault weapon". Rifles, pistols, and shotguns, if it uses energy from firing to load another round into the chamber, it is a semiautomatic assault weapon under the law.
Clearly this needs to go away.
Oh, and don't ignore the possible unintended consequences. (assuming they actually are "unintended")
If something is declared a hazardous product, there are a host of licensing, packaging, shipping labeling and storage requirements that apply to the manufacturers and shippers, which do cost money to comply with. And, that's just the tip of the iceberg...