How can I make McDonald\'s type French Fries

How can I make McDonald\'s type French Fries References I have eaten french fries from most popular fast food joints. McDonald\'s has been the best by far. Crisp & crunchy on the outside yet moist inside, still maintaining the potato taste. Also it does not go soggy after taking it out of the deep-frier. I have tried my best to recreate what they do, I even went to great lengths to get their pre-fried fries from their outlet. Anyone have any idea how to make this?