I have an g&p m16a3, and I am swapping out the reciever body. The only problem is that I can't remove the barrel nut which is on really tight. I am using the ar15 barrel nut removal tool the correct way, but it refuses to move, and due to such pressure, the upper receiver has deformed and a piece of the upper has snapped off. I don't have a vice, and without a vice, is there an easy way to remove the nut?
