Recommended parts list for build your own 12" upper?

[RobertFL]

I recently bought upper parts from several vendors. I could not believe how quickly they arrived. The group buy 1-7.5 twist 12 inch Monster barrel and bolt only took 2 or 3 days to arrive. The barrel looks really good and passed the drop a round in and out of chamber test also no problems hand feeding from magazine, have not fired a round yet. Other parts came from Primary Arms (Aero upper, gas tube, Foxtrot Mike Handguard), B Kings (tool craft bolt, KAK flash can), Joe Bobs (Warne MSR scope mount), Optics Planet(Burris scope), AR15Discounts (gas block)... All at my door in 2-3 days after ordering