Rosco Manufacturing does not state if the barrel included in their Bloodline Sauce Pack is dimpled. I'd recommend reaching out to them directly for more information.
All Rosco brand barrels are dimpled for proper gas block alignment and ease of installaton.
I ordered the 11.5 kit, and my barrel was dimpled. Not sure if the other barrel lengths are different though.
I have two of their bloodline barrels and they do have one dimple for the gas block.