"Attack Butterfly is the second in The Rust Bucket Universe series from Boson Books.
Susan's eyes gleamed with the intensity of a natural born killer instinct. She was always ready to play rough.
Susan watched the fixed sight sweep onto another destroyer as her ship came from behind the enemy fleet. She fired her Mark VI and peppered the enemy destroyer from stern to bow. She definitely saw two of her shots go clear through the hull to reveal space on the other side."