If I were browsing the science fiction section of a bookstore and this was the opening scene of a novel, I’d have to read on before deciding if I liked it or not. It could be the opening scene of a great book, or it could be the opening scene of a terrible book. But it has potential.
I like the use of “chronotranslative” which fits perfectly with the register.
If I know my SF, chances are good that the hero will say, “Meh, they’re just bluffing” and turn out to be right. It sounds like an opening for a story that plays on contrasts, heavy on the technobabble in one scene, lighthearted or even comic in the next. Of course, it takes a skilled writer to pull this off well.
Personally, I’m entertaining the idea that the lethal weapon alluded to is a cosmic flyswat (after all, it’s lethal to something, and certainly less powerful than a 300 megaton thermonuclear bomb). I’m not sure about this; maybe it’s too silly. But it’s the image that came to mind.
Ha! HSAR, my friend, you are the coolest! This story is funny and interesting all at the same time. The format works great. I wish I could write as ‘technical’ as you do, because I’d love to sequel your stuff. – Great job!
Sorry for second comment, but I forgot to give honorable mention to the line: ‘Thank you for your time. Have a nice day’. (Great line, especially after threatening to pound their vehicle with 300 megatons of explosives!)
ElshaHawk (LoA) 
Zerrakhi 
BiC 
HSAR