Based on scaled version of the equations of ideal magnetohydrodynamics it is shown how to construct a steady flow with a shock in a mirror. The upstream state is supersonic, but essentially arbitrary. The shock must be Mach number one on axis although the Mach number may rise rapidly off axis. The shock is extremely effective in converting the directed streaming energy of flow into randomized thermal energy. Such flow patterns may be of interest in very long theta pinches where quasi‐steady flow may obtain or in plasma gun devices where the gun injects a plasma along a magnetic field.