Glad you got the LBK from PSA so quick, 11B, nice to get the lower done (and done right with quality parts)!
Back to building the upper receiver group yourself or buying the URG, I'd go the latter unless you're determined to do all the assembly yourself. Really that doesn't matter, what matters is choosing the right components that go into the URG and I've always been able to find exactly what I want from PSA, BCM and Daniel Defense. I was able to find URGs factory built to my exact specs so why bother to assemble the upper myself. Up to you of course.
Myself, I prefer a 16" pencil barreled midlength upper. Chrome lined barrel, 1:7" twist. Full auto/M16 BCG from BCM, DD, PSA or other milspec unit.
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together.
US Army 1966-69, VFW Life Member, Retired Geek
Last edited by Quentin; 03-08-2013 at 08:33 PM.