My question is: How does she sheathe the weapon when you have to aim it at the scabbard?
How about the Cutlass? Using one of those in a sci-fi setting is pretty unusual.
http://www.coldsteel.com/1917cutlass2.html
Star Trek has Lirpa's and Batlithe's doesn't it? Dune has daggers. Traveller is less over the top then Dune; cutlasses are a tradition more then an actual but implausibly justified weapon.