The Glock 17 is a 9mm short recoil-operated locked breech semi-automatic pistol that uses a modified Browning cam-lock system adapted from the Hi-Power pistol. The firearm's locking mechanism utilizes a linkless, vertically tilting barrel with a rectangular breech that locks into the ejection port cut-out in the slide. During the recoil stroke, the barrel moves rearward initially locked together with the slide approximately 3 mm (0.12 in) until the bullet leaves the barrel and chamber pressure drops to a safe level.
A Glock 17, is carried by police officers in Live Free or Die. In Madrigal, Chris Mara uses one with a supressor to kill Duane Chow. A Glock 17 (accidentally instead of a 22), is used by Hank Schrader during the gunfight between Jack Welker.