I'm so glad I found this thread! This will be my first venture into building an AR and also my first venture into the platform. I've been looking for the right upper and lower and have found a few that I've liked but nothing ever really screamed this is the one. Once I started reading about the San tan lower, I fell in love. As I was browsing the website, I quickly became disappointed that they didn't offer an upper to match. Now that I see there is one in the works, and with the quality of the lower you already make, I'm twice as excited! And hey, if you need someone to test run one and give some feedback on possible improvements I wouldn't be against giving one a try, if you know what I'm sayin'�� haha but put me on the waiting list, I'll be one of the first to order and I hope you keep this thread updated on the release date of this upper!