Re: Proper length of pull? AICS?
Depends on your proportions (height, weight, build, arm length, neck length) and if you wear corrective lenses. I'm 6'4", 185 lbs, with long arms, long neck, and wear glasses. My rifle has a 14.5" LOP, with the scope mounted as far forward as I can get it.
Correct setup is one where you can take your shooting position with your eyes closed, open your eyes and have a proper sight alignment.
Adjustable stocks are great for fitting the rifle to YOU, not the other way around.