Re: What Noveske Switchblock for 8" 300BLK
You could use it if you started with the barrel gas port wide open at 0.120, but the question is - why would one want one? What problem is it designed to solve?
5.56mm cyclic rate raises a lot when you put on a can. 300 BLK does so much less. The AAC 9 inch 300 BLK rifle can shoot from subsonic unsupressed to supersonic suppressed and all cyclic rates are within Colt M4 specs.
300 BLK does not need an adjustable gas block. The way to see this is that Noveske makes 300 BLK rifles, and they make the Switchblock, but they don't make a 300 BLK Switchblock.