The Glock (and the 92FS in the HD pack) can fire underwater. A suppressed version is used by the female Black Ops, and HECU (Hazardous Environment Combat Unit) medics are also seen using the pistol in the Opposing Force expansion pack. The secondary fire button makes it fire faster, but with reduced accuracy. It has a 17 round magazine capacity and is accurate, but not particularly powerful.
The Glock 17 is the standard issue sidearm of the Black Mesa security guards.
