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.