Daniel Defense DDWAVE Muzzle Brake, 556NATO, 1/2X28, Black Finish 06-049-11048 The DDWAVE Muzzle Brake is designed to securely mount the DD WAVE suppressor to the host firearm. Manufactured from aerospace 17-4 PH stainless steel and salt bath nitride finished for minimal corrosion. Heavy acme threads serve to disrupt carbon build-up as the suppressor is detached" allowing for easy removal even after extended use.