Forrest, the top civies at CP are shooting White Oak Precision/White Oak Armament uppers. The military teams vary. The AMU gets parts from the various mil spec contractors and the AMU smithies build all the rifles up from scratch. The USMCR team gets issued Marine armorer rifles, hand built like the AMUs, but are restricted to shooting 77 grain BH ammo in them. No handloads or other ammo, such as BH 600 hard ammo with 80 grain SMKs. The USMCR team has resorted to many of them shooting their own uppers, and a few years ago RRA made them a sweet deal on a bunch. Having pitted with and shot with several USMCR team members the last few years, I have heard no complaints on the RRA uppers.
The AMU sources barrels from 5 or more makers - Krieger, Douglas, Shilen, and a few more. Their armorers barrel up the the uppers themselves.
The All Guard team has rifles built on mil spec receivers. They use Smith Enterprise sights, and I gotta tell ya these things are junk compared to the WOP/WOA setups. They also use (or did use) Jewell triggers, another piece of junk. maybe they switched to another trigger. I'll ask them this weekend assuming they come up and shoot the BCGC 4th matches.
So, while I agree that RRA is an outstanding component and rifle maker, their rifles do not dominate the national matches at the upper echelons of shooting skill. Lots of them on the line. Lots of junior programs using them. Lots of run of the mill civies using them. All with good success.
If they would just come out with a windage adjustable FSB and better headspace control on their chambering operation then their box stock rifle would be stepped up to a top of the line rifle.
before someone chimes in about the "new" bushie NM, all I can say is I'll withhold comment on it until I have one to test for an extended period. The old bushie NM rifle was absolute dog sheite. Chincy rear sight, bad mags, triggers that failed more often than not, feeding problems, lower quality float tubes. The triggers were absolutely the worst on the market. We have a few dozen of them in a clinic/junior program at BCGC. These rifles, particularly the clinic rifles, see very little use. In 2005 we took 7 lowers in to have the triggers fixed/replaced by Bushy at CP. The only RRA trigger failure I experienced was at about 15,000 cycles and the hammer broke, and I dry fire as much or more as I live fire that lower. RRA had me send in the lower and in 7 days including the weekend I had the lower back with a new trigger assy in it, no charge.
Also, you and I both have fingered our share of DPMS rifles that have passed through the shop for repairs or shipped in on transfers. These are by far the roughest looking, poorest fitting upper and lower receivers I have laid eyes on. DPMS = Darned Poorly Made Shinola in my book from hands on with their AR15-based products.