Use a good barrel in an AR and you should expect 1moa, or slightly less, given an appropriate bullet choice and load selection, and a shooter capable of delivering with an AR.
The Wylde chamber, and facsimiles, do tend to shoot the best groups among AR’s, but getting a 223rem SAAMI spec or 5.56 spec chamber to shoot sub-moa isn’t a challenge. 1:9” twist isn’t magical, any twist will shoot small groups when given an appropriate bullet weight. External contour - aka barrel profile - has nothing to do with inherent accuracy of a bore. A good bore in a pencil barrel will outshoot a poor one in an Hbar. Stiffer barrels are harder to influence, and heavier barrels don’t heat up as quickly, and cool down more quickly, which can be an advantage in some higher rate of fire competition circumstances, but light barrels can shoot just as well as heavy barrels - certainly sub-moa.
There’s nothing I want from a chrome lined barrel in any of my AR’s.
If you want a factory offered, fixed handle, 20” Hbar which will shoot very well with 50-69grn bullets, that RRA is a good choice.