they were armed with four new model 6-inch/47 caliber mark 17 guns, that were only used in the "erie"s. their anti-aircraft armament originally consisted of only four quadruple /75 caliber guns; these were later augmented with the addition of four oerlikon cannons. the "erie"s were also equipped with two mark 6 depth charge roll-off racks that could hold 15 depth charges each.