Actually it DOES do more than look whatever. It exposes the shooter to much greater danger in the event of catastrophic failure. Being as the engineers did NOT take into account the removal of metal that is integral to the structure. Having seen several bolts that were fluted many has the flutes cut through the joints where the bolt head is soldered in place.
My advice to anyone contemplating this fad is to make real sure to get a copy of the liability insurance of whom ever does the work.
Truly NOTHING says "looks cool" more than a dude with part of his head blown off.
OP would you consider getting the suspension on your car fluted? It may or may not fail at high speed.
Dirty Harry had a cool line, something about feeling lucky?
Which brand rifles have the bolt heads soldered in place? I would like to know so as never to buy one of those rifles.