A couple of things. First, Trump said he was for an assault weapons ban in his 2000 book. He could have only been referring to Clinton's 1994 “assault weapon ban” law. That law, still on the books in 2000, did ban the sale of new AR 15s with evil features like bayonet lugs. It was a stupid law and Trump was stupid to support it.
Second, fully automatic weapons and stuff like cannons, mortors, etc. have been heavily regulated since the passage of the 1934 National Firearms Act. They are legal today, but very expensive and rare. People that have them do not use them to commit crimes. Please cite any examples of an NFA legally registered weapon used in a crime.
But you think it is wrong for someone to have a $25,000 legal Colt M-16 in their gun collection. Ok. I don't. And neither does federal law. Go ahead and say it - you have Obama on your side.
Please Explain to me what is the purpose of owning that particular gun made by colt.
a) collector of powerful weapons
b) defensive weapon against intruders in your home
c) fighting the US army