What about knives? Vehicles? Rocks? This is a slippery ass slope. I'm not a gun guy, but I am wise enough to know that there is ZERO logic behind believing "they'll only regulate this, not that."
You bring up valid concerns, but knives are already effectively illegal - the police in New York have a lot of leeway in deciding what constitutes a "gravity knife".
This is why "1%" bikers favor ball-peen hammers - they know they can always carry one legally.