The American Precision Arms Gen II Fat Bastard Brake has a nut that is a separate piece. This allows customers to install the brake themselves at home. Installations take about 30 seconds and have no hideous crush washers or peel washers to deal with. Additionally, competitive shooters can easily remove this brake for cleaning or simply to move if from barrel to barrel. Competitors can burn through 6 barrels or more in a season at times. The APA Gen II Fat Bastard Self Timing Muzzle Brake made for a barrel diameter of .850-1.0 inches APA Gen II Fat Bastard .338 3/4x24 Brake