There WILL be elements of the military that will follow any order, blindly. Some will do it because they are 'brain-washed', others because they are afraid to disobey an illegal order, others because they are just stupid, and many because of the power that comes with obeying the order. (Case in point, look at recent articles about cops brutalizing handcuffed women.)
They are welcome to my guns and ammo, one bullet at a time. If they manage to take it all, then life becomes more dangerous for them... the fight will be carried to them using American ingenuity.