You are handed a fancy new prototype gun, and that makes you super happy - until you have to actually use it, and you find out that the functionality and marketing speech don't add up. From great leaders requesting more and heavier guns for their ship to design committees choosing one compromise after another and delivering a monstrosity that would make even a Vogon purple with envy or a war machine that's more of a danger to the user than the target.
Come over to hear what fun you as a DM can have when the players' expectations for this new super gun are through the roof and then they find out that the field testing of the prototype was way more important to the bigwigs than the lives and limbs of the players' characters.