Got to agree with Wash , no Adj gas block needed . H2 buffer is a must have item.
I have an Adj gas block on a 24" barrel turned it down then opened it up to find a smooth pattern of ejection of brass and have not touched it since.
The PRI Quiet Brakes I have work great with muzzle rise, I can keep scope on target and watch bullet impact in target. But the Quiet part ,IDK ? , pretty good side blast also !