Actually it does not limit your choice

ye- yeah it does. "shall not be infringed" means shall not be infringed.

What is an assault weapon?

Marianne what kind of gun do you think is the coolest?

All you're doing in passing an assault weapons ban is restricting gun access to marginalized communities and making them less safe as well as subjecting them to more violence from the state (i.e. police)

Why does it seem more likely that Gatling guns are made legal than AR-15s getting banned? Is everyone insane in the U.S. now?

Correct.

In 1789, there was no way of knowing the weapons of mass destruction that would be readily available today, if they knew, the founding fathers would have either significantly modified or eliminated the 2nd Amendment.