Gonna have my DPMS barrel threaded for a surefire mb. Best one to go with would be the 6.8 muzzle break? Tighter seal around the bullet would produce the best results, don't you think. I have a .30 mb on my .308 and realize keeping them the same would be preferable for future suppressor use. Really more concerned with recoil than noise suppression. Is anyone using 6.8 surefire mb on their .260? Opinions please.