In the most minute technical aspect, you are correct but you are missing the larger picture.
When it is said that you can buy it over the internet, the implication is that it is done anonymously and without scrutiny. The intent is to scare people and increase pressure to ban this weapon.
The claim is a half truth and therefore a whole lie.
Anyone that went online to purchase any gun would soon find out that you still have to have it shipped to a local dealer to get the paperwork done.
But its still a fact that you can find/buy anything you are looking for online and are no longer limited to what dealers in your local area have in stock.
That is a major improvement from what limited selections were an option a few short years ago. Nothing is gained by trying to keep that a secret.