M4 Carbine/AR Detailed Zero Instruction

I never have liked the old zero videos that I did, so I put together a simple but complete explanation that I feel anyone can understand if they have their rifle in front of them. The only thing I didn't do in this video was show the front sight post being adjusted with the nail. If you were wondering about that, the nail is used to depress the A2 sight stop at the 12 position on the front sight post. I will do another video on it I guess.