A configurable composite bridge plug apparatus and method for converting bridge plugs into frac plugs in the field of operation is disclosed. The bridge plug apparatus includes a body with a cylindrical hollow inner mandrel, an upper threaded end and a lower threaded end. A release ring with threads disposed on an outer surface is attached to the upper threaded end. An upper restriction element and a lower restriction element plug both ends of the hollow inner mandrel so that flow is restricted in either directions. A stand-off pin holds the lower restriction element in place. A ball seat inserted proximally to the upper restriction element towards the upper threaded end. A cage retainer is attached to the ball seat with a ball. The configurable bridge plug transformed to a frac plug by removing the upper restriction element and the lower restriction element from the bridge plug.