G18

The Glock 18 is a machine pistol in Call of Duty: Modern Warfare 2. It was seen used during the snowmobile chase at the end of Cliffhanger. It has also been confirmed as a machine pistol in multiplayer. The pistol is depicted in a "desert olive drab" color scheme.

History
It is a select-fire version of the Glock 17 pistol, with single-burst-full fire modes. It was created for Austrian counter-terrorists and considered one of the few 'true' machine pistols.

Call of Duty: Modern Warfare 2
The Glock 18 is the default sidearm when using the Snowmobile in Cliffhanger. It is confirmed that the G18 will shoot in 3-round burst in Special Ops. It has higher recoil and rate of fire than other machine pistols like the PP-2000, but has the advantage of better accuracy.

Trivia

 * The Glock is held in the left hand on the snowmobile, when seconds before the player got on, he used his right.
 * The Glock 18 was voted one of the most favorite new weapons in Call of Duty: Modern Warfare 2.