Described herein is a golf club head comprising a deflection feature to increased ball speed and launch distance, while producing desirable acoustics and optimized mass distribution. The deflection feature can include any one of or any combination of an insert comprising a gap, an insert comprising voids, a thin uniform sole, a cutout in the top rail, optimized face material, a thin sole, a reinforcement device, or a multi material weight. The rear cavity insert comprises voids within the body of the insert providing a change of insert density. The faceplate comprises a reinforcement element allowing the faceplate thickness to be reduced while simultaneously reducing faceplate stress.