Yup! Pretty much described my new sub 1/2 MOA upper!
Build/assemble it yourself from components you choose. There are 100's of vendors selling parts these days. Prices are quite low now too.
I suggest you start with a quality barrel.
2. Black Hole Weaponry
3. White Oak Armament
For higher end barrels.
Spend the next money on a quality trigger.
1. Jewel (if you can find one)
2. Timney 3.5lb modular drop in
Billet upper & lower receivers, free float hand guard, A2 stock assembly, Rock River one piece scope mount, nickle boron bolt-carrier assembly, charge handle with a wide release.
Hand picking components and doing the assembly yourself can reduce the cost by about 25% over paying retail price.
Take a look at the stock assemblies that Magpul offers.
Couple exceptions - I've still to find a nice trigger.
Forged vs. billet receiver - I'm no metallurgist, but the forged receivers got the majority of the cudos for strength (not so important with light barrels, but 26" bulls need extraordinary strength to hold nearly a yard of thick steel by 1" of its end. (RRA's are forged...tipping point (in my case anyway).
Oh, FWIW, the Krieger bbl was chambered with a JGS 223 Wylde
(match) reamer too. Reference the FREEBORE for the JGS 223 Wylde chamber
claim to be any expert, but happy to share research results and your suggestions as well as other experts e.g., Big George, et al:
1) reamer chart. 2) (11º) crown, .920" diameter. 3) 26" (finished) w/ JP Enterprises adjustable gas block.
"My guy" at Krieger was Tod.
He walked me through the various options and offered some critical advice.
Hope this helps!