Basically correct for silencers, but omits the fact that since 1986, full auto guns may not be made for civilian hands. There is about 2000 citizens per "transferrable" full auto firearm, thus making them preposterously expensive, and essentially worthless with regard to the intent of the 2nd amendment.
Well, a semi-automatic AR-15 (the first firearm I plan on owning, be it in the National Guard or as a civilian) is just as good as a fully-automatic one.
Besides, as "Enemies Foreign and Domestic" showed us, a single shot in the right person's head sends a good message to the anti-gun fascists.