The animation did not show a “bump fire stock”. At all.
It did show an adjustable stock inexplicably sliding in & out, and included the irrelevant, rare, & scary suppressor and grenade launcher.
A slide stock is a bump stock.
The animation matches the gun in their video.
The animation makes you wonder who they bought the ‘piece’ from. Maybe some Russian fake news guy?
If I watched this video and took it serious....I’d draft a law against grenade launchers being sold to the public.