c9 sw-155 pistol

"It's a SW‒155 officer's pistol," Asaka said, smiling in such a way as to give Ryouko the impression she liked talking about weapons. "You're required to keep one with you whenever you're in alien combat. It might not look much compared to some of the other things here, but it's one of the most advanced weapons in existence."

She paused.

"You should take the time to practice with it later at the firing range on the eighth floor," she said. "I'd be glad to show you. But it's got all kinds of features. Like all military weapons, it refuses to respond unless the wielder has a Human DNA trace. More importantly, it doesn't just fire bullets. It uses universal ammunition, and you can use your mental interface or the manual controls to order it to fire all sorts of things, such as concussion grenades, flashbangs, antiarmor missiles, small drones, various modalities of lasers, and so forth. It's the first of its kind."

"The point is that, as an officer and magical girl, it's a last resort weapon. It's supposed to be able to do anything and everything, should the need ever arise. Other weapons aren't like that—it's horribly energy‐inefficient, but it's not meant for sustained use. Hopefully you'll never have to use it."

"Remember, though," she said. "There are limits to what is possible, so if you want to fire something like an antiarmor missile, you're going to have feed it several magazines of ammunition. That's why it's recommended you always carry at least six. Anyway, you can have everything sent home to you. Unless you really want to go home carrying it."

(To The Stars, Chapter 9)