Same way they track anything. If you put over $10K in cash at a bank, the bank under threat of hefty fines and punitive measures have to file a SAR. Once the SAR is filed on you, you’re officially in the system and you better tread carefully

Same shyt. If you buy certain weapons, gun distributors should be required by law to file similar reports. From that point forward they can easily track owners of these weapons, charge fees to own such weapons and demand mental health checkups. And if you’re caught with such weapons without being documented, you, the person you got the weapon from and the place that sold it gonna have some hard questions to answer