Got my new parts in for my AR-15 rifle. (STAR-15!) It's an upper group by Bravo Company MFG. I chose it because Bravo has very stringent quality controls, and because it is manufactured to US military specs. (M4 feeds ramps in the upper as well as the barrel extension, 1:7 rifling, chrome lined bore and chamber, etc...)
Of course, in order to use this in NY state, I have to remove the front sight/gas block and replace it with one that doesn't have a bayonet lug. I also can't use a pistol grip with it, since I want to keep the threaded barrel available to use different flash hiders. Thsi means I'm going to have to order a thumbhole stock from Midway USA. That's OK though, since it's the stock Carter had on her M4 on SG-1. :D
Buying from Bravo was great experience. They sent me a free hat and key chain as well. The parts look top notch, and I can't wait to get them on the range. I'll be purchasing the bolt group from them as well.