a system and method for a diffuser muzzle brake . the exhaust ports are upstream of the reaction plate . this allows the deflection and redirection of exhaust gases to reduce recoil . the internal cylinder bore and exhaust ports are manufactured with cost saving methods . the muzzle brake has at least one radial exhaust port pattern . the muzzle brake has at least one longitudinal exhaust port pattern . the muzzle brake has at least one downstream reaction plate .