Quoted:
What role do you envision the gun serving?
A noveske ss barrel will likely be more accurate, but for a 12.5" AR I'll take the lighter barrel that should last for more rounds.
I've owned both. I bought the Noveske 12.5" first, had issues with a suppressor, and got a Daniel Defense 12.5" for a lot less.
I sold the Noveske 12.5" and have no regrets in doing so. It's a very smooth shooter, a machining work of art, and very accurate, but I don't view a slight increase in accuracy as an acceptable compromise for a significant reduction in reliability.
I no longer see a need for proprietary chambers in a non-600 yard AR, nor do I believe that a direct impingement AR-15 should have an adjustable gas block (such as the Switchblock).
Pistons can make sense for suppressed SBRs. If you're going to complain about the extra weight of the piston system, and shoot it suppressed, how about the extra pound hanging off the end of your muzzle?
I'd also look at the 11.5" BCM "BFH" barrel.