Looks nice. I'd go back to the LGS and get a detailed list of the parts. You deserve that so don't let them put you off, they should know what they're selling.
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together.
You'll remember the quality of a gun long after you forget how much you paid for it.
US Army 1966-69, VFW Life Member, Retired Geek