A few years ago I decided to build myself an AR . As with most things that I do I studied on what I would want to do to get the most out of one that I built . I didn't want to just put parts together and hope that it would be accurate with most factory ammo or even my hand loads . I then discovered that there are so many things that can and probably should be taken into consideration when you build an AR the same as when you decide to learn how to hunt , trap , call and snare coyote and other animals . I soon found out that it's often the small things that tend to make a big difference in the out come of such endeavors . So then during the course of my search for knowledge I stumbled across some youtube videos by American Gunsmith done by a guy named Joe Carlos that so far have held a lot of good information on building an accurate AR .