I recently de-linked about 800 rounds of m80 and m855 by hand. Use leather gloves, padded if you have them. Get a wooden piece of ceiling trim or other wood that's reasonably sturdy but thinner than the opening of the link. Make it long enough to be at hand level when sitting in your comfortable chair in front of the TV. put one end of the piece of wood on the floor (carpeted, or put a rug or towel down) and hold the other end between your knees. Hold the belt bullet-side up and use the piece of wood to push the round out as you press down on either side. pick up/separate the links/ammo.