Hmmmm!!!!Browning X-Bolt Predator Hunter A-TACS AU Bolt Action Rifle - 204 Ruger - The X-Bolt Predator Hunter A-TACS AU is suppressor ready, supplied with muzzle brake and thread protector. ... The X-Bolt's new three-lever Feather Trigger provides a clean, crisp pull with no take-up or creep and minimal overtravel.