This is the new Self Timing Round Mini Magnum Muscle Brake. It has a flush round nut on it for a more pleasing appearance than the typical nuts with flats on them. The first port is 90 degrees to direct the majority of the blast/concussion away from the shooter with the proceeding ports being angled to further reduce recoil. The result is a brake with top level recoil reduction and also not obnoxious to the shooter. If your barrel is threaded 5/8×24 simply screw the brake onto the rifle, level it up and snug it down with the supplied tool.
NO GUNSMITHING REQUIRED IF YOUR BARREL IS THREADED 5/8X24.
WORKS ON ANYTHING UP TO 6.5 CAL