A cleaning tool for maintaining a firearm includes a flexible brush adapter having a first end and an opposing second end. The flexible brush adapter includes a rotation-resistant cable characterized by two or more layers of strands having differing directions of lay. The cleaning tool further includes a brush attachment coupled to the flexible brush adapter at the second end thereof. The brush attachment includes a plurality of bristles. In one example, the brush attachment comprises a longitudinal twisted wire spine. The spine captures the plurality of bristles extending radially therefrom. The bristles include copper alloy bristles intermixed with stainless steel bristles.