Abstract: An electrode assembly for electrochemically etching the rifling of a gun barrel and method of manufacturing the electrode assembly is disclosed. The electrode assembly includes a unitary cage formed of insulative material, such as a thermoplastic polymer like Nylon, disposed about an electrically conductive core member. The core member includes a generally cylindrical body portion that has an outer generally cylindrical surface with a plurality of helical grooves disposed the length of the body portion, and a threaded member that coaxially extends from one end of the body portion for connecting to a rifling rod. The grooves have a generally dovetail cross-section and at least one radially extending recess disposed therein. The unitary cage has a strip portion disposed within each helical groove and end portions disposed at each longitudinal end of the body portion of the core member.