I get it Dave, I have 2 Sanders uppers 1 in 223W the other in 6.5Grendel, both of them came with a Jerry Michalak style muzzle break, and they are not needed on either of the uppers! yes, they are loud! all of my other uppers have a spiral type of flash hider on them and work well, neither of these calibers need a muzzle break.