Stealth’s gun knowledge, sneaking into a helicopter

The sergeant shot a look over his shoulder. John was sitting very still. His arms were at his sides and his head was tilted back. Monroe gave his eyes a moment to adjust to the shadows inside the Black Hawk and saw the harness straps pulled tight across the man’s arms and body. His collar and tie sat funny, and another second of light-adjustment let the sergeant pick out the black chrome bar pressed against the man’s throat.
Monroe blinked. It had only been a few seconds since he turned his head, but now he could see the very feminine shadow behind John. She gave a slight dip of her head, an acknowledgment he’d spotted her. Then she pulled herself closer to the man named John. On either side of the helicopter soldiers raised their weapons.
“The M240B has a prodigious rate of fire,” she said in a clear voice. “Seven hundred fifty rounds per minute at its lowest setting. It is not a weapon designed for pinpoint accuracy, however. Firing into an enclosed space will almost guarantee you hit your civilian advisor.

Excerpt From Ex-Patriots, pg 195-196
Peter Clines
https://books.apple.com/us/book/ex-patriots/id585738393