Hmmm , while I agree in principle , this certainly did not happen with the National Firearms Act of 1937 and full-autos. If you had a machine gun , you registered it , and if you sold it , you paid a $200 transfer tax. Which shockingly, hasn't gone up. $200 was a lot of money in '37. Approx. $3200 today.

Crimes , murders and suicides with legally owned and registered full-autos is practically non-existant.

And aside from freezing the number of legally transferable MGs in '86, the politicos have made NO hay over legally owned and registered MGs that I know of. At least on the Federal level.

The problem today is the first time a multiple shooting is on the news , legally owned and registered or not , the registration fee becomes yearly. And with every event after that , the tax gets raised.