Well...I have a 100,000-ton WarShip that mounts a few capital weapons (and indeed no non-capital ones), but that's my very first design ever and probably shows it. Paired NL/45s and White Shark launchers respectively in alternating arcs, so at best you get four lasers and a two-missile salvo pointed at any given single target on the broadside...even taking apart a conveniently motionless DropShip (i.e., what you get if you hand one to the MegaMek bot on the space map) can take a few turns with those, although scoring the occasional crit at ranges over which it can't reply yet is comparatively easy.
Though, to be fair, the Hawk-class corvette is supposed to be more of a light patrol/picket vessel and perhaps convoy escort (along with the two DropShips of its own that it can carry) and not so much a dedicated hunter/killer unit, so it may fall a bit outside the scope of this thread.