" The pistol had been one hell of a find, because it hadn't quite been what she'd thought it was at first blush. Not simply the S&W Mk 39, but rather a modified version of the same, the Mk 22 Mod 0, also called the "hush puppy". It was Vietnam-era, not the most reliable gun in the world, but wonderfully silent, not only equipped with a silencer to eliminate the sound of gunfire, but also with a slide lock, to keep the actual mechanical operation of the gun quiet as well. She'd test-fired the gun at the market before purchasing, and been stunned that it still worked. The Uzbek vendor had offered to sell it to her cheap.
"It's too quiet," he'd explained. "No one wants it."
Chace shut her eyes, half smiling at the memory. "

― Greg Rucka , Private Wars (Queen & Country, #2)