According to Black Rain, it makes it stronger and keeps it cooler. I see you went with the Ergo stock, good choice, that is what I put on mine.
Not directed at you, Mark...
I see this type of comment, and I want to clarify for anyone who doesn't know; that statement must be qualified by this: "for the weight." If such clarification, then it can be true.
But taking a given barrel, and fluting it, will NOT make it stronger. Period.
I have to question the claim that that particular type of fluting keeps the barrel cooler, as the primary way that fluting aids cooling is increasing surface area. That appears to be flat fluting, in which case, it reduces surface area.
Looks cool though.