Alrighty, let's talk about AR's! I'm in the process of building my first AR right now. I've got an Anderson lower and a PSA upper. I also bought a PSA lower build kit, but PSA forgot to ship it with the upper. So I'm still waiting for that to arrive before I start building out the lower. For optics I have a Burris fastfire 3 mounted on top of a carry-handle style rear sight. So, what are you doing with your AR?