She's done.

I got the upper yesterday. I didn't realize RRA stuff had such a nice fit and finish. It mates perfectly with my RRT lower, no wobble or gap. No optics on it yet, just my BUIS. I'll be investing in a DD Omega first, then probably an EOTech later on. I am absolutely in love with this rifle. I'll probably get the barrel cut to 14.5 and turned down to a pencil profile in the future, but for right now I just want to shoot it. Pics and range report tomorrow.