How can I make McDonald's type French Fries I have eaten french fries from most popular fast food joints. McDonald's has been the best by far. 

Crisp &amp; 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?
What you want is Kenji Lopez-Alt. Here.

Summary:  


Cut fries 1/4 inch thick to maximize crispiness  
Blanch fries with a little vinegar in the water
The vinegar preserves the potatoes' pectin and keeps them from disintegrating in the water
Briefly fry
Freeze the fries
This opens up their internal structure and allows more crispification
Before serving, fry for the last time


Another advantage of doing fries this way is that the blanching, pre-frying, and freezing can be done in large batches in advance.