Hello /k/, /x/ here. I'm writing a story which will involve guns in a few key points, and I need some help from you.

So, pistols. How exactly do you empty a pistol? I know you take out the magazine by hitting a button near where you hold the gun, but how do you get the round in the chamber out, do you rack the slide? Or is there a different way? Also, would it be reasonable to attach a flashlight to a pistol by using tape, by not getting any tape on the slide?

Pic related, gun I'm using in context for the story.