While I am in partial agreement with your above post, this is a second aspect of gun control. Fortunately, the majority of Americans agree that access to fully automatic weapons is also needed. Hopefully, in the future, we will see where the majority that wants to see restrictions on other means of massive fire power have their say.
Those that believe what you said, there should be no other restrictions, and people should be able to buy all the ordinance they want, are small enough so that at least fully automatic weapon, armor piercing rounds and other means of killing are restricted.
A right that is forced is no right. A person can also elect to simply plea guilty, or to have a judge hear his case. Juries are utilized in a fraction of all cases. To do as you suggest would require all adults to give up a week every month or two to go serve on a jury.
I would agree with what you said only on the condition that the stature disallow an assault plea to be plead down to allow for firearms, or make a place for that to be part of every plea deal on an assault case.