I certianly doubt they know who has what. The ATF cant even properly keep up with the NFA registry...
Never happen.
The information age goes both ways. The common citizen knows the names and whereabouts of agents and govt officials, their children and other family members.
None of this will end well even for the agents family dog. Covert urban warfare is impossible to be clean. Look at Iraq and Afghanistan just for starters.
The govt knows this, it’s been gamed out for decades which is why it will never happen. Also why the founding fathers made this number two in rights.
Never happen because there are too many working in the govt that will cause covert disruption and disinformation so it would most certainly implode.