Fiction: Agents of Discordia, Part I

Here's a story/novel I'm in the process of writing. I dusted it off recently and would be interested in feedback. There's not much here, currently, I know. Maybe, I should enter NovelRace too:)

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She peered around the corner and pulled back quickly. He was still there, beside the door. She had only ten minutes before the shift change. If she had to do it, she would have to move now, while he was alone. The next shift was the one that had two guards, because some technocrat had done a time and motion study, and found that two people in the graveyard shift were less likely to fall asleep than one.

She bent down and picked up a pebble. Aiming at the streetlight across the road, she threw the pebble, hitting the metal bar. Instantly, the guard was alert and raised his gun, pointing at the light. She rapidly swung her gun and pressed the trigger. The gun emitted a lightless, silent beam that struck him on the neck, causing him to reach up and feel the sensation. Before he could complete the action, he slumped and then fell where he was standing.

Her new gun was a taser designed to ionize the air between itself and the target, causing a strong electric shock to be transmitted. The miniaturization into a handgun was inevitable, and meant that operatives such as her could stun their targets with minimal danger to themselves. Of course, her Corp had patented the technology and protected it fiercely, so she was sure that there was no defense yet. Further, by getting it classified as a non-lethal suppression device, they had avoided the modified Second Amendment, and the consequent registration formalities.

This was a quick in-and-out operation, so she rapidly moved to the door, easing it open and letting herself in. The corridor beyond was bathed in a dim purple light. Her Omnisense Mk VII did not indicate any moving bodies. She would have to minimize her own profile to avoid detection. She knew the best way of doing that was to stay against the wall, and use corners effectively. Her guard up, she moved through the corridors, looking for a room marked "Ops Lab".