Reading before bed last night. In the story, the woman has a Glock. Eventually there is reason to draw it. In the end she decides not to shoot and then "with shaky hands, she carefully put the safety on".
That was it, book dropped on the floor to be return to the library unfinished.
I will give you faster than light propulsion, vampires, magick, and any other premise you need for a science fiction/fantasy story. But by $DEITY, if you're going to introduce a Glock, do your internet research and get it right.
And no, let's not get me started on movies.