Sooooo.....Guns bad is as far as your thought process goes?So that you can poke a hole at the slightest weakness and conclude that any and all change is fruitless? Being acquainted with P&R, I'm well aware of the skew: the slightest weakness invalidates a premise other than your own.
Truth be told, I don't know how best the Amendment should be amended. I only know it is presently more destructive than constructive and is little more than a wet dream for the gun lobby that is the title of this thread. The Second Amendment is broken. You don't necessarily have to know how to fix it to know it's broken. But it would be a good starting point: the source. Because largely unfettered and unlimited legal access to guns enhances illegal access to guns.