Perhaps something along the lines of "if you try to take my gun and freedom,I'll be forced to kill you".
That's the implication of the more pithy, "From my cold dead hands" which has an "understood", "and I ain't going easy".
But in way you're right. Both UN bureaucrats and gun grabbing US PoliCritters should be well aware, that they'll be the main target, should they order the police, military, or Blue Helmets to confiscate guns from law abiding citizens. They can't get them all at once, and they should think about that.