James, I'm pretty sure the bill of rights doesn't have anything at all to say about assault rifles, for or against.  Lots of people who fetishize the second amendment don't appear to have the slightest idea what it says: "A well regulated militia being necessary to the security of a free state, the right of the people to keep and bear arms shall not be infringed."  First of all, notice that it's all one sentence.  There is no period or paragraph separating the part about the well regulated militia from the part about bearing arms.  It's almost as if the founders were thinking more about the right of states to stand up militias than they were about gun fetishists having the right to collect assault weapons.  Second, note that established law already interprets the second amendment to allow regulation of heavy weapons like fully automatic machine guns.  If we can regulate machine guns under the constitution, we can also regulate assault rifles, high capacity magazines and "bump stocks".