Our 6.5 Grendel Ruger American Predator Linear Muzzle Brake Compensator Fake Can Fake Suppressor is perfect for your precision bolt action rifle. Precision machined from T6 6061 aircraft aluminum and finished off in a matte black type III hardcoat anodized finish, this muzzle brake compensator will look great on your Ruger American Predator or Ruger Precision Rifle bolt action. Please ensure your barrel is threaded 5/8-24 thread pitch. Some 6.5 Grendel barrels are known to be threaded 9/16-24, this however is NOT. This is threaded 5/8-24, so please ensure your barrel is too. All our muzzle brakes include a free crush washer for timing your muzzle brake to your rifle.