 The unit took the title Antrim RGA (SR).On the outbreak of World War I in August 1914, the North Irish Coast Defences comprised No 15 Company, RGA, at Derry, and the Antrim RGA (SR) at Carrickfergus.The Antrim RGA manned two Vickers-Maxim Mk VII 6-inch guns at Grey Point Fort, a new battery built at Helen's Bay on the south shore of Belfast Lough between 1904 and 1907.