Cerberus’ Mark 2’s weapons

She shot a grin at St. George, then nodded across the room. “See that sheet of plywood?”
…
“Three,” he said, “two, one.” He tapped a button on the laptop, something clicked in the battlesuit’s arm, and St. George heard a quick noise like a guitar string being plucked and muffled.
Something smashed into SW PLAT 2 with the sound of metal on concrete. The target rocked on its stands and then came to rest. A fresh hole had appeared at shoulder height.
Danielle’s lips formed a tight grin.
“Nice shot,” said Gibbs.
St. George walked toward the plywood. “So what the heck is that?”
“I wanted to call it a slingshot,” she said, “but Gibbs pointed out it’s a lot closer to a repeating crossbow.”

Excerpt From Ex-Isle, pg 60-62
Peter Clines
https://books.apple.com/us/book/ex-isle/id989619017