A Cardassian rifle was a rifle weapon used by the Cardassian Guard. (DS9 episode: "Return to Grace")
In 2360, Kira Nerys killed two Cardassian soldiers and took one of their rifles. (ST - Terok Nor novel: Dawn of the Eagles)
In 2361, the Shakaar resistance cell had stolen at least six Cardassian rifles. (DS9 novel: Fearful Symmetry)