We do have one of those.

[quote][b]Gothren Class Artillery Vessel:[/b] Variants can measure between 1 and 1.5 km in length, and different models are armed with gauss, plasma, solid torpedo or laser munitions. Fast, and well sheilded the Gothren-Class is used in kill teams of three to six designed to concentrate fire on enemy capital vessels and fortifications. They are exceptionally dangerous vessels to ships of their own size designation and greater, and can be used to great effect against orbital defenses and planetary targets. A lack of secondary weapons systems, however, leaves them vulnerable to strike craft and to enemy ships who manage to close with them.[/quote]