It should be removable; the CVA website doesn't even show a muzzle brake, is this an add-on or a special edition of some sort. Look for a weld or pin at the back edge of the brake, and if not present, it isn't welded. It might take clamping the barrel in a vise and some sort of tool or a rod through the side vents to break it loose, as there may be some sort of thread locker used. Why do you need to remove it, is it too loud?