Mechforce Enforcer Muzzle Brake 6.5MM Creedmoor VersionFeaturing the artillery style three stage trapezoid baffle field proven design that is capable of significantly reduce recoil felt and muzzle climb. 5 8 24 precision machined tight tolerance thread for 6. 5mm Creedmoor barrel; thread and center bore are machined in one operation to ensure the absolute dead on concentric GD&T requirements. Comes with (4) Variable Timing Crush Washers with four different thicknesses each offsets un torqued muzzle device