You would think the Klingons, being a warrior culture, would have come up with some eminently practical pre-firearms weapons. Yet, look at the most distinctively Klingon weapon of all, the bat’leth or betleH: http://www.klingonimperialweaponsguild.org/ A crescent-shaped blade, sharpened on the inner curve, wielded with two handles on the outer curve, with four points. It looks nasty, but it’s got no reach. Unwieldy, too. A 17th-Century human swashbuckler with a rapier or a katana could take down a bat’leth-armed Klingon in half a minute.
Then there’s the daqtagh, a dagger with two forward-slanting spring-loaded prongs on either side of the hilt that, presumably, pop out when a button is pressed. Looks way cool, don’t it? But, what is the purpose of those prongs? What do they do that a broad static hilt-guard couldn’t do? If my enemy has a daqtagh, gimme a plain ol’ Bowie knife!
Memo to all movie and TV SF writers: Don’t try to invent new weapons. Unless they’re black-box-technology weapons, like phasers. Otherwise, if humanity’s bloody history to date, and all our ingenuity in devising ways to kill each other, has never yet produced a given basic design of weapon, then that design is probably not a practical one for humanoids of any species.